Makeup for Exam 3

If you are taking the makeup for exam three it is in room 2.224 (the lecture hall) not 3.224 as I may have emailed you.

Exam 3 procedures

Exam 3 will be Thursday night from 7:30-9:30. You will have exactly 120 minutes.
Here are the details

1. Bring a calculator
2. Bring a pencil to write with
3. Bring your ID to prove who you are
4. Go to the correct room

If your last name starts with A-L your exam is in UTC 2.112A
If your last name starts with M-Z your exam is in WEL 1.308

When you get your exam make sure it says "Vanden Bout" at the top.
You will need nothing else at your seat but your pencil and calculator.
Everything else (periodic table, formula sheet, answer sheet, exam, scratch paper...) will be provided for you.

The exam will go from 7:30-9:30. Please be on time. If you are late, please be quiet to respect those who arrived on time. If you arrive late there is the possibility that you will not be allowed to take the exam. Once the first person has finished the exam and left, no one will be allowed to arrive and start.

You may not arrive and start the exam and then leave and decide you have a conflict and that you need to take the make up exam. Once you get an exam you have to turn in an exam. You are responsible for all these things. You should arrive on time. You should not expect to able to work past 9:30. You should put your version number on your exam. You should not throw away your exam in case there is a problem with your version number. If there is a problem and you cannot produce you original exam, you will get a zero.

Review notes

The notes from Dr. VDB's Exam 3 review are here. If there are topics that are not specifically addressed, do not simply ignore them and assume the review notes cover all possible questions. This is merely meant as another study tool.

Formula Sheet

The formula for Exam 3 will be identical to those for Quiz 5. It can be found at the end of the lecture on catalysis.

Yet more reviews for Exam III

Dr. Vanden Bout will hold a review session on W 5/6 from 3-4 in WEL 2.246.

Another review from Travis

Travis will hold another review session tomorrow 5/6 in WEL 1.316 from 7-8PM. This will likely be identical to the review on 5/5.

Exam Three Review

Travis Johnson will be having an exam 3 review on Tuesday 5/5 from 8-9 PM in Burdine 106. This will cut his academic community time short by one hour.

New worksheets and practice materials

The worksheet page now has a worksheet for ogranic/polymer chemistry along with a practice exam 3. In studying for the material you should know the informaiton from lecture along with any material found in the course pack lecture notes. A new lecutre notes on biopolymer is on the lecture page.

Question Types for the Final

The following questions will be on the final exam. Note these may change slightly over the next week or so.

Physical Equilbria
1. Theory: temperature and physical equilibria
2. Theory: dissolving gases, liquids, solids
3. Theory: dissolving gases, liquids, solids
4. Ranking: miscibility of liquids
5. Problem: phase diagram navigation
6. Calculation: ΔH for heating across phases
7. Calculation: vapor pressure in binary system
8. Calculation: Clausius Clapeyron
9. Ranking: Van't Hoff and solution conc.
10. Calculation: colligative property

Chemical Equilibria
11. Setting up K from equilibrium expression
12. Calculation: equilibrium concentrations from K
13. Problem: Reaction direction from Q and K
14. Problem: LeChatelier and reaction direction

Water chemistry
15. Temperature dependence of Kw
16. Ranking A/B strength from K values
17. Approximations of A/B equations
18. Simple A/B calculation (strong, weak, buffer)
19. Simple A/B calculation (strong, weak, buffer)
20. Identifying buffers (after neutralization)
21. Buffer neutralization calculation
22. Identifying features of a titration curve
23. Titration strong A/B with strong A/B
24. Titration weak A/B with strong A/B
26. Estimating solubility from Ksp values
27. Calculating molar solubility from Ksp
28. Common ion calculation, Ksp
29. Equilibrium expressions for a polyprotic acid
30. Amphiprotic polyprotic acid calculations
31. Mass and charge balance

Electrochemistry
32. relating E, ΔG and K
33. balancing redox equations
34. ranking oxidizing and reducing agents
35. stoichiometry calculation from current
36. interpreting electrochemical cell diagrams
37. cell convention: electrolysis versus voltaic
38. understanding standard reduction potentials
39. calculating cell potentials (not Nerst)
40. calculating cell potentials (Nernst)

Kinetics
41. assigning rate expressions
42. calculating reaction rates
43. units of rate constants
44. method of initial rates
45. integrated rate law calculation
46. extracting information from straight line plots
47. kinetic theory
48. Arhenius equation thoery
49. combined Arrhenius calculation
50. reaction mechanisms
51. Ea and energy profiles
52.Famous catalysts

Descriptive Chemistry
53. properties and reactivity of main group elements
54. properties and reactivity of main group elements
55. properties and reactivity of main group elements
56. properties and reactivity of main group elements
57. Famous names chemical manufacturing processes
58. naming organic molecules
59. naming organic molecules
60. biomolecule structure

Exam III questions

The following questions will be on exam 3

1. assigning rate expressions
2. calculating reaction rates
3. units of rate constants
4. method of initial rates
5. integrated rate law calculation
6. integrated rate law calculation (half life)
7. extracting information from straight line plots
8. kinetic theory-collision
9. kinetic theory-transition state
10. Arhenius equation
11. combined Arrhenius calculation
12. reaction mechanisms
13. reaction mechanisms
14. Ea and energy profiles
15. famous catalysts

Descriptive Chemistry
16. properties and reactivity of alkali metals
17. properties and reactivity of alkali earths
18. properties and reactivity of the B family
19. properties and reactivity of the N family
20. properties and reactivity of the C family
21. properties and reactivity of the O family
22. properties and reactivity of the halogen family
23. famous names chemical manufacturing processes
24. identifying famous gemstones

Organic Molecules
25. hydrocarbon isomers
26. naming organic molecules
27. naming organic molecules
28. organic polymer chemistry
29. biomolecule structure
30. biomolecule structure

Another practice quiz is posted

Another practice quiz is posted on the worksheet page along with a key

More Geology

What gemstones to know? They are in the course pack. There are also here.
Emerald Beryllium Oxide
Ruby Aluminum Oxide
Sapphire Aluminum Oxide
Topaz Aluminum Oxide
Amethyst Silicon Oxide
Agate Silicon Oxide
Onyx Silicon Oxide
Diamond Allotrope of Carbon
Pyrite Iron Sulfide
In addition make sure you know the following "minerals"
asbestos Silicon Oxide
Talc Silicon Oxide
mica Silicon Oxide

Extra Credit

The extra credit assignments are the easiest way to pull up your grade. Everyone should do them. Everyone. To date I only have responses form about 1/3 of you. If you have not done it then set a goal to do it tomorrow.

Travis Review for Quiz 6

Travis will have a review for Quiz 6 on Tuesday 4/28 from 7-8 PM in WEL 1.308

Extra Credit Due Date Update

As I would like everyone in the entire class to do both extra credit assignment the due date will be extended until 11:59 PM May 6th. I want to get them done before the end of class so I can make sure we know who is exempt from the final.

Practice/Worksheet Quiz 6

Practice for quiz 6 is posted on the worksheet page. There are a whole pile of questions for elements in groups 1-4 and then groups 5-8. You should be able to track down the answers in either the class notes or the course pack notes. Note: these were grabbed from a testbank to give you lots of practice. If you can do these then I am certain you will be able to do the questions on the quiz. You should treat this as a worksheet and find the answers rather than as a practice quiz despite the multiple choice format.

Quiz 6 questions

The following questions types will be on quiz 6

1. Group 1 property
2. Group 2 property
3. Group 3 property
4. Group 4 property
5. Group 5 property
6. Group 6 property
7. Gemstones
8. Important named reactions

What gemstones to know? They are in the course pack. There are also here.
Emerald Beryllium Oxide
Ruby Aluminum Oxide
Sapphire Aluminum Oxide
Topaz Aluminum Oxide
Amethyst Silicon Oxide
Agate Silicon Oxide
Onyx Silicon Oxide
Diamond Allotrope of Carbon
Pyrite Iron Sulfide
You should know the compound not the ion that yields the color

The Haber Process
The Hall Process
The Bayer Process
The Oswald Process
The Contact Process. This process is not in the class notes, but only the course pack notes.

Quiz 5

If you had a problem with your version number of EID on quiz 5 please be patient. Currently the system is not letting us make these changes to get your quiz graded. Travis will deal with this ASAP. If you have not emailed him your EID and version number than please do so. If you have already, then rest assured he has it and will fix it as soon as the system is fully functional again.

Practice Quiz

A practice Quiz 5 is posted on the worksheet page

Final Exam

Many people have asked me about taking the final at another time. The time is scheduled by the registrar and is not under my control. It is currently scheduled for SATURDAY, MAY 16, 2-5 PM. That is the time. By University policy I cannot offer the final at another time. If you have extrodinary circumstances that prevent you from being able to take the exam at the time you may make such request to the Dean's office as is laid out in the University's final exam policy.

Extra Credit #3

It could not be easier. Here is what you need to do.

1. All over campus there are scholarly lectures. All the time. They are on a wide array of topics. Go to one. Learn something. Enjoy. Send me an email.
2. Make sure your email has the correct address vandenbout_class@mail.cm.utexas.edu
3. Make sure your email has the subject line "Scholarly Lecture Extra Credit"
5. Make sure your email has your UT EID
6. Make sure I receive you email before April 30th

How can you mess this up? Simple. Don't follow directions. I'll try to give you some ideas in class on up coming lectures.

Extra Credit #2

It could not be easier. Here is what you need to do.

1. This week is the undergraduate research forum. It will be held in Welch (in the outside our class room on Friday 4/17. Many undergradaute will be presenting posters on their research. You need to go an talk to one of them. Then send me an email and tell me the following. Their name. The title of their poster. And one thing you learned talking to them.
2. Make sure your email has the correct address vandenbout_class@mail.cm.utexas.edu
3. Make sure your email has the subject line "Research Poster Extra Credit"
5. Make sure your email has your UT EID
6. Make sure I receive you email before April 30th

How can you mess this up? Simple. Don't follow directions. What if you can go on Friday? Not a problem. All over campus there are posters up in the hallways of buidling explaining research projects. Take a wandering walk around Welch Hall or any othe science buliding and you'll find plenty. Go to one. Learn something. Enjoy. Send me an email.

Quiz 5 Questions

The kinetics quiz will have the following 6 question types

1. assigning rate expressions
2. method of initial rates
3. identifying order of reaction
4. arrhenius calculation
5. integrated rate law
6. half life calculation
7. kinetic theory -- collision and transition state concepts
8. reaction mechanism

Kinetics Worksheet Posted

Kinetics worksheet is posted

Makeup Room

The makeup Sunday is in the lecture room 2.224

Another EXAM 2 review from Travis

Travis will have another exam 2 review tonight (4/1) in WEL 1.308 from 6:30-7:30.

Exam 2 procedures

Exam 2 will be Thursday night from 7:30-9:30. You will have exactly 120 minutes. The questions types and formula sheet can be downloaded here

Here are the details

1. Bring a calculator
2. Bring a pencil to write with
3. Bring your ID to prove who you are
4. Go to the correct room

If your last name starts with A-L your exam is in UTC 2.112A
If your last name starts with M-Z your exam is in WEL 1.308

When you get your exam make sure it says "Vanden Bout" at the top.
You will need nothing else at your seat but your pencil and calculator.
Everything else (periodic table, formula sheet, answer sheet, exam, scratch paper...) will be provided for you.

The exam will go from 7:30-9:30. Please be on time. If you are late, please be quiet to respect those who arrived on time. If you arrive late there is the possibility that you will not be allowed to take the exam. Once the first person has finished the exam and left, no one will be allowed to arrive and start.

You may not arrive and start the exam and then leave and decide you have a conflict and that you need to take the make up exam. Once you get an exam you have to turn in an exam. You are responsible for all these things. You should arrive on time. You should not expect to able to work past 9:30. You should put your version number on your exam. You should not throw away your exam in case there is a problem with your version number. If there is a problem and you cannot produce you original exam, you will get a zero.

Explanantion Practice Exam II

I'll update any changes to the practice exam here
For #26, the answer is correct, but the explanation should say voltaic cell.

#27 the answer is wrong. For an electrolytic cell the potential should be -0.63.

Wed TA office hours

Katie Clark's office hours will move from Wed 8-10, to Wed 9-11.

Exam II Review 3/31

Travis Johnson will be holding a review on Tuesday evening from 9-10 in BUR 106. This will replace his last hour at the academic communities.

Exam conflicts

If you have a conflict with our exam this Thursday evening. It will be from 7:30 until 9:30 at night. The makeup exam will be next Sunday night from 6-8.

Exam 2 practice

The exam 2 practice materials have been sorted out. There is an AB practice, an echem practice, and a practice exam. All are on the worksheet pages.

Exam II Thursday 4/2

Here are the question types for the 30 questions on Exam II
1. calculating simple buffers
2. identifying buffers (after neutralization)
3. ranking acidity and basicity based on equilibrium constants
4. buffer capacity
5. buffer neutralization calculation
6. identifying features in a titration curve
7. titration calculation
8. titration calculation
9. estimating solubility from Ksp
10. calculating solubility from Ksp
11. common ion calculation
12. selective precipitation
13. approximations of acid base equilibria
14. polyprotic acid equilibria
15. polyprotic acid calculations
16. mass and charge balance
17. setting up complex equilbria
18. equilibrium expressions for a polyprotic acid
19. equilbrium calculations dilute solutions
20. equilbrium calculations sulfuric acid case
21. equilbrium calculations weak polyprotic acids
22. balancing redox reactions (in acid or base)
23. balancing redox reactions (in acid or base)
24. ranking oxidizing and reducing agents
25. assigning ED cell nomenclature
26. assigning EC cell nomenclature
27. calculating Ecell at standard conditions
28. relating E, ΔG and K
29. Stoichiometry calculations from current
30. calculating cell potential (Nernst)

Reviews Exam 2

We'll have a review on Monday 3-4 in the lecture room and on Wed 3-4 in the lecture room. I will be available for 30 minutes after these to answer other questions.

More Electrochemistry Problems

Worksheet 11 is posted that covers the relations between eChem and equilibria. I put up slightly improved versions of these on Thursday night.

Quiz 4 results

Great work on Quiz 4. 88 average. Now we need the same hard work for Exam 2. We need to pick up all the acid/base equilbria. There is a 30 question practice posted on the worksheet page. This is a great place to start. There will be reviews next week from Dr. Vanden Bout and Travis Johnson. Make sure to attend at least one if not all. They will be M, T, and W. Time and places determined soon.

Deadline for Extra Credit #1

The deadline for the first extra credit assignment is 3/30. Don't miss it.

Quiz 4

Another practice quiz 4 is posted on the worksheet page. Don't worry about electrolysis. For relations between G, K, and E you should remember what we learned in equilibria that for spontaneous reacitons ΔG is negative and K is greater than one. What is new is that this corresponds to a voltaic cell (or battery) and that E > 0. The opposite is true for the non-spontaneous electrolytic cell.

Quiz 4 NO Calculators

no calculators on the quiz. You will be expected to be able to do some math without them. Particularly involving faraday's constants. For example F = 96,485 C mol electons. So you might discover that you have a charge of 96,485 and you'll need to be able to divide this by 96,485 and see that you have one mole of electrons. You'll also have to be able to add two numbers together to get an Ecell. For example the anode potential might be 0.5 and the cathode might be 0.82V. You'd need to be able to find Ecell = 0.82-0.5 = 0.32 without the aid of a computational device.

Quiz 4 review #2

Dr. Vanden Bout will have a review on Wednesday from 3-4 in our lecture room. This the only time I could get the room. If you have questions I will have a bit of time after the review to answer them.

Quiz 4 review #1

Travis Johnson is having our first Quiz 4 review session tonight (Tuesday 3/24) from 7-8 PM in our lecture room WEL 3.224

Quiz 4

Yes we have a quiz on Thursday. No, it will not be delayed. You need to start studying now. We will have a review on Wednesday as well as some time in class on Thursday to go over things again.

Topics will be electrochemistry
1. assigning oxidation numbers
2. balancing redox reactions
3. identifying strong oxidizing (reducing) agents and/or reactions
4. charge calculations (grams to electrons. Moles to coulombs)
5. Electrolysis reaction
6. Ecell calculation for standard cell
7. Cell nomenclature (anode/cathode, signs of electrodes,...)
8. Relationship of E to G to K


If we don't get to something then I'll drop it from the quiz after we are done.

Office hours

Monday Katie will hold Dr. Vanden Bout's office hours in Wel 1.308.
Wednesday she will be in Wel 2.122. Both times will be from 3:30-4:30

Small error in the practice quiz have been fixed

Formula sheet for Quiz 3

The formula sheet for quiz 3 is at the end of the lecture notes for 3/12

Spring Break Extra Credit announced in advance

We will have our first extra credit opportunity over Spring Break. It could not be easier. Here is what you need to do.

1. Explain a scientific concept you learned in class to someone over spring break.
2. Email me after spring break telling me about your adventure in teaching.
3. Make sure your email has the correct address vandenbout_class@mail.cm.utexas.edu
4. Make sure your email has the subject line "Spring Break Extra Credit"
5. Make sure your email has your UT EID
6. Make sure I receive you email before March 30th

How can you mess this up? Simple. Don't follow directions. For example will an email with the subject line "Can I get the extra point's Dr. VDB?" work? No. It will not hit my email filter properly and it will get trashed. What about an email with no EID? No. I have no desire to track down what EID goes with what email. What if I send it at 1 AM on the 31st? No. Again the email filter will look at the date and the subject. Other than that you can do no wrong. Pick a topic. Explain it to someone. Email me about it. You can write a page or two. You can write a couple of sentences. Either way you get the point. That is one point added onto your final average in the course. So if you have an 89% before the final and you do this assignment. You'll have a 90%. You get an A for the course and you don't have to take the final. If you have a 69% after the final you get a 70% and a C. If you bombed everything but then you got at 79% on the final. You get an 80% for the whole course! We will have two more extra points up for grabs in the second half of the course.

Dr. Vanden Bout out of the country

I will be gone for the next week. Dr. Rossky will be giving our class lectures next week. The notes will be posted this Monday for both the lectures in advance. Katie Clark will be holding my office hours both Monday and Wednesday next week. Remember there are office hours at different times nearly every day and academic communities most nights of the week. I will be giving a lecture at the Light Harvesting Processes Conference in Bayreuth Germany. I'll tell you what I learned about new directions in solar energy (if you are interested) when I return.

Practice Quiz

A practice quiz #3 is on the worksheet page.

More on how to recognize an acid or base

It is very clear we are all still having problems identifying acids and bases. This does not bode well for working and understanding complex problems. As such I have made another sheet to help us identify acids and bases. At the bottom I have included polyprotic acids that we will look at on 3/5. The worksheet is on the worksheet page as well as here

New old worksheets posted

We have some acid/base worksheet from last spring that I have posted for extra work.

A word of warnign #2

Everyone needs to be studying more. From what I hear from the TA's no one is going to office hours. Is the materials getting harder? Yes. Did we all ace the last exam? No. So I can look into the future and I worry about people who are not working every day to try to keep up. Our next quiz is not until the week before spring break. This does not mean do not study until then.

A word of warning

If you can't quickly identify species in a problem. That is a weak acid, that is a spectator ion, that is a strong base...If you can't rapidly convert from Ka to pKa, from Ka to Kb with Kw, from H+ to OH-. If this isn't all second nature, then you will have a hard time on the quiz. The quiz will deal with neutralization. What makes a buffer solution. For all of this you need to be able to rapidly figure out what is in solution.

Quiz3 questions

Here are the questions for Quiz #3. This is the Thursday before springbreak.
identifying buffers (after neutralization)

simple buffer calculation
buffer neutralization calculation
titration calculation (at the equivalence point)
polyprotic acid equilbria
polyprotic acid calculation (amphiprotic case)
approximations in acid base calculations
setting up complex equilbria calculations (mass and charge balance)

How to recognize an acid or base

Look at the helpful worksheet on the bottom of the lecture page under extra stuff entitled "how to regognize an acid or a base. Or better yet download it right here Don't worry about FeCl3 and BH3. Remember the following. ...ic acid goes with "ate". Acetic Acid and Acetate. Know the strong acids and their associated ions. Nitric acid and nitrate. Perchloric acid and perchlorate. This will help you pick up spectator ions. Finally, amines are weak bases. They are ammonia with one or more of the hydrogens replaced with an organic bit such as CH3 or C2H5....

A new course pack lecture 12 is posted

Worksheet 5 is posted

Exam1 Details

This are the same are earier today.
We have an exam tomorrow night. Wednesday 2/18 from 7:30-9:30.

Here are the details

1. Bring a calculator
2. Bring something to write with (preferably a pencil)
3. Bring your ID to prove who you are.
4. Go to the correct room.

If your last name starts with A-L your exam is in UTC 2.112A
If your last name starts with M-Z your exam is in JES A121A

When you get your exam make sure it says "Vanden Bout" at the top

The exam will go from 7:30-9:30. Please be on time. If you arive late you will not be able to start once the first person is finished and has left the room.

Makeup Exam Sunday 2/22

If you have a conflict with Wed. Take the exam on Sunday 2/22.
The exam will be in WEL 2.224 (that is our classroom) from 6-8 PM. Note this is a different time and place than the Wed night exam.

It is very important that you take the "Vanden Bout" exam and not the "Laude" exam on Sunday night. Follow instruction and you will be fine.

Exam 1 changes

We will have calculators. The exam will also be 7:30-9:30 to ensure you have enough time.

Exam 1 reviews

Dr. Vanden Bout will be having an exam review Tuesday 2/17 from 4:30-6:00 in Jester A121A. The head TA Travis Johnson will be having a review 2/17 from 6-7 in WCH 1.120 (Hogg, not Welch).

Exam 1

Exam 1 will have the following questions



Physical Equilibria

1 temperature dependence of phase changes
2 vapor pressure theory
3 salt dissociation in water
4 phase diagram interpretation
5 phase diagram navigation
6 calculating ΔH from heating across phases transitions
7 gas solubility in liquids
8 ranking miscibility of liquids
9 Clausius Clapeyron equation
10 Van't Hoff factor in colligative property calculations
11 colligative property application
12 colligative property calculation
13 colligative property calculation

Chemical Equilibria

14 setting up K from equilibrium expression
15 appreciating the magnitudes of K
16 calculating equilibrium concentrations from K
17 determining reaction direction from Q and K
18 LeChatelier and reaction direction
19 LeChatelier and reaction direction
20 Van't Hoff equation and T dependence of K
21 relationship of ΔG to K

Introduction to Water Equilbria

22 theory of auto-protolysis of water
23. temperature dependence of Kw
24. molar solubility calculation
25. ranking solubilities based on Ksp values
26. converting between pH, pOH, [H+]+ and [OH-]
27. ranking acidity and basicity based on equilibrium constants
28. strong acid or base calculation
29. weak acid or base calculation
30. weak acid or base calculation

Exam 1 in Wednesday night 2/18

No Calculators on Exam 1

Practice Exams are posted

2 practice exams are posted on the worksheet page.

Quiz 2

Looking at the results for quiz 2 it is very clear that many people are having trouble with the van't hoff factor. Either they don't know what it is, or they don't know their common ions. I suspect it is not knowing what different compounds are. Magnesium Bromide is MgBr2. Magnesium is in group II. It has a two plus charge. Bromine is in group VII the bromide ion is -1. If you don't know these the go to section Chapter 2 in the book. Look at table 2.3, 2.4, 2.5. Then try the following

practice for van't hoff factor

TA contact

If you have a problem with a quiz or exam grade (like you got a zero because you bubbled in your name wrong) contact Travis Johnson

Important stuff form 2/12/09

With the quiz we ran a bit short on time. However there are a couple of key ideas I want to point out that we will go over again on Tuesday. First and foremost work the worksheets. Key. Try all the problems. Understand not just how to do them, but why. Try to make a new problem that is similar but different.

Topice from today that got cut short. Acid strength. The relative strength of the acid is related to the Ka. Strong acids we assume Ka = infiity. That is obviously the biggest. For the rest the biggest Ka means the most "stuff on the right" or "products" in the dissociation reaciton. That is the most H+. That is most acidic. So if one acid has a Ka of 5.2 x 10-5 and another is 3.8 x 10-3. The 3.8 x 10-3 is the stronger acid. If you missed that 3.8 x 10-3 > 5.2 x 10-5. You should also know how to conver Ka to Kb for the same species. Ka is given for HA, but you want Kb for A-. Or Kb is given for B. and you want Ka for BH+. Fear not. Ka*Kb = Kw. So you can always switch back and forth between the two. There is a lovely discussion of this in the book in section 7.8. Don't be thrown by their efforts to make this about salts of weak acids and weak bases. If you can regonize A- and BH+ your in greatshape.

How to recognize an acid or base

Look at the helpful worksheet on the bottom of the lecture page under extra stuff entitled "how to regognize an acid or a base.

Quiz 2 NO CALCULATORS AGAIN

Equilibria Problems

Several people have requested extra help with how to solve equilibria problems. There is a quick handout on this I posted at the bottom of the lectures page. It is called "how to solve equilibrium problems". Enjoy. However this is an old handout so ignore the references to chapter numbers at it is refereing to a different book.

Wed office hours

Dr. VDB's office hours on Wednesday will be in our classroom. WEL 2.224. Quiz 2 review.

Next time

Thursday is a big day. We have a quiz, and I will try to introduce all the material you need to know for the first exam. We'll have more practice next Tuesday, but I don't want to have any new material.

DVB thoughts on 2/10 lecture

Fire alarm had us in a bit of a hurray. Key thoughts for the day. It is the entropy of mixing that "pushes" reactions to have some products + some reactants rather than all of one or the other. Thus the equilibrium expression have in them only those compounds that add to the mixing. Solutions (concentrations) and gases (partial pressures in a mixture) solids and liquids do not appear. We say they have an "activity" = 1. Thus we drop them from the expression because multiplying of dividing by 1 doesn't matter. Next we looked solubility equilibria. How is this different from other equilibria? It isn't! They put the SP on the equilibrium constant simply to give it a name to be able to categorize similar dissolution reactions. But the ideas are all the same. Finally, water chemsitry. Water falls apart into H+ and OH-. Not much. But a little bit. Why do we care. Because H+ and OH- are quite reactive and a little bit makes a big difference for many materials. pH is a measure of H+ concentration. It is a log scale simply to make the very small numbers into nice big positive values. And last but not least we learned that neutral means that [H+]=[OH-] concentration. This happens at pH =7 at room temperature, but since K is a functino of T, it will be different at different temperatures.

Make up exam

If you are taking the make up exam because of a conflict please send me an email explaining why. If you don't get a response. Don't worry. Take the exam. You should only be worried if I write you back and say that it is specifically not ok to take the makeup. Just to be very clear. No response = fine.

Relationship between K and T

Please see the "extra" course notes on the relationship between K and T. In class we looked at the temperature dependence of K, but not on a "formula" to actually calculate K at different Ts. This is course pack 7+


Problems for Quiz 2

There is a second practice quiz 2 on the worksheet page. The following problems types will be on the quiz on Thursday

1. van't hoff ranking of magnitude of colligative properties
2. colligative property calculation
3. setting up an equilibrium expression
4. LeChatlier's principle reaciton direction
5. Q vs K reaction directin
6. RICE diagram to find equilibrium values
7. Relationship between ΔG and K
8. Relationship between K and T

Practice Quiz for Quiz2 is posted on worksheet page

Alternate Exam Time

If you have an exam conflict (lab, exam in another course,...) that you have contacted me about, you will be taking the exam at the alternative time. It will be

Sunday, February 22, 2009  6:00  pm  - 8:00  pm  WEL 2.224  

The makeup time will always be the Sunday evening following the regular exam.

DVB lecture thought 2/5/09

Learn to work RICE diagram problems. See the "course notes" We'll do more next class. Learn le Chatlier's principle. Equilibrium will shift to minimize the added perturbation. Learn the temperature dependence of K. We hit this today but we'll do more on Tuesday. There is a new supplemental "lecture note" up on the lecture page. Lecture note 7+ that covers this explicitly. Finally, you need to be able to calcualate ΔH for a reaction and ΔG for a reaction. If you can't then read the old CH301 course notes "Quantitative Look" and "Free Energy". Or read sections 9.6 and 10.9 in the text.

DVB lecture thoughts

My lecture summarized in 200 words or less. Reactions come to equilibrium with some products and some reactants present at the same time. Sometimes there is so little or one or the other that we ignore it. Sometime this little bit is very important or the reaction has substantial amounts of both products and reactants. The ratio of the concentration of the products to the reactants is fixed at equilibrium. It is the concentrations of the products (raised to the stiometric ratio) divided by the reactants. This number could have any value. It depends on ΔG for the reaction. Most importantly it is not always 0.25 as in my example. I just made up K for this example. K could have any value. It depends on the reaction and the temperature. It does not depend on the initial conditions. The concentration of any particular reactant or product depends on the initial conditions, but K does not. Q is the ratio of products to reactants right now. Q > K "too many" products and the reaction shifts to reactants. Q < K "too many" reactants and the reaction shifts to the products. Q = K the reaction is at equilibrium.

Quiz 1

Two problems dropped. See "grading" page

Quiz Results

There is one problem I may drop from the quiz as it was a bit confusing. No it was not the Claussius-Clapyeron equation question which required only basic algebra. However the rank the vapor pressure questions required knowing something about some of the molecules. However, as a result we'll talk on Tuesday about what moleucles you need to know.

More options for course packs

We had such demand for course packs we ran out (or the printer didn't deliver enough) As such you have a 2nd chance to get your course pack. Before class on Tuesday (2/3). That is before class not after. You can also go before Dr. Laude's class at 1:30. And if that doesn't work you can get them from the NSC in W.C. Hogg 2.306 or 2.222 next week. After that you're out of luck.

Another chance to buy course packs

You can get our course pack again today (1/29) after Dr. Laude's class at 3:15. Be sure to ask for Vanden Bout's course pack so you get the right one.

Quiz 1 grades

Scores and solutions will be posted after 4PM on Quest

In case you missed it

Quiz 1 will have the following questions From Lecture 1:
Qualitative vapor pressure question.
Clausius-Clapeyron calculation

From Lecture 2:
Thermodynamic signs and phase changes (like sign of ΔH or ΔS going from s g)
Interpreting phase diagrams
Calculating ΔH for a substance as T changes across various phases. This is the only bit straight from CH301 material.

From Lecture 3:
Dissolving salts in water
Dissolving gases in water
Ranking miscibility and solubility in liquids

QUIZ 1

Quiz 1 will be in class on Thursday 1/29. It will be a scantron quiz. You'll get a printout and a scantron sheet. You'll put your name, EID, and version number on the scantron. Bubble in the answers and turn it in. You can find you grade on the Quest system one it has been scanned (like the tests you took in CH301). Bring a PENCIL

We will not use any calculators for this Quiz. No calculators at all. None. Zero.
If there are questions that use a formula you will need to set up the equation or answer based on a qualitative trend.

Practice Quiz

There is a practice quiz found on the worksheet page. Work the worksheets. Then try the practice quiz. Not the other way around. If you have trouble with the work sheets come to office hours. Find a TA. Seek help. See below.

Academic Communities have started

Academic communities have started. There are TA's waiting to help Sunday to Wednesday Evenings. Find a time. Go every week.

Eduspace Update

For people looking to login to Eduspace. The course code is UTEXA-C116C80C292B6E
Full instructions can be found here

Course Packs Updated

Course packs will be available Thursday (1/29) after class. They may also be available for a limited time the follwoing week. Bring $25 cash or check. No plastic. All funds go straight to student scholarships.

To be very very clear
One time only. Thursday is the best day.
Cash or check only. Come prepared.

Quiz 1

Wouldn't you like to know what is one Quiz 1. Lucky for you, you checked the webpage. Great idea.
There will be 8 questions on the following general areas.

From Lecture 1:
Qualitative vapor pressure question.
Clausius-Clapeyron calculation

From Lecture 2:
Thermodynamic signs and phase changes (like sign of ΔH or ΔS going from s g)
Interpreting phase diagrams
Calculating ΔH for a substance as T changes across various phase

From Lecture 3:
Dissolving salts in water
Dissolving gases in water
Ranking miscibility and solubility in liquids

January 22, 2009

Lecture summary in 100 words or less.
Different liquids have different vapor pressures.

The vapor pressure of a liquid is independent of the volume of the liquid and the volume of the gas. The two are in equilibrium at one partial pressure if both are present.
Equilibrium is a strong function of temperature. This is quantified with the Claussius-Clapeyron Equation.

The boiling point is the temperature when the vapor pressure is equal to the total pressure. Normal boiling point is the temperature when the vapor pressure is 1 atm.

Phase changes involve heat (ΔH) and entropy changes.
Fusion is solid to liquid
Freezing is liquid to solid
Vaporizaiton is liquid to gas
Condensation is gas to liquid
Sublimation is solid to gas
Deposition is gas to solid

Know how to read a phase diagram, find the vapor pressure, boiling and melting points, locate different phases, triple point, critical point.

Website is functional

If you encounter a bad link. Crazy incomprehensible text. Odd dates. Anything that seems like it is not correct please email the webmaster at vandenbout_class@mail.cm.utexas.edu

No Thermo?

Perhaps you just slept through the end of CH301. Perhaps you had Dr. VDB for honors CH301 and didn't cover thermo. Perhaps you transferred to UT and your first semester class was totally different. What to do? Read. You need to figure out what energy (enthalpy) and entropy are in a general sense. If you have Zumdahl then look at chapters 9 & 10. In particular read an try to understand section 9.1 and 9.2 for enthalpy and 10.1, 10.3, and 10.4 for entropy.

What else can I do. Look at the notes in from old course packs for CH301. These notes were graciously provided by Dr. Laude. They are at the bottom of the "lectures" pages.

Things You Should Have/Buy

Book. The text for the class is Zumdahl Chemical Principles

iClicker. You will need an iClicker for our in-class "quizzes"

Things you need to BUY - if you don't already have them

zumdahl cover
Textbook
clicker
iClicker

The Textbook

Why is Dr. Laude's class using a different textbook? Because Dr. Laude likes it better.Why have I seen TWO different Chemistry Textbooks that are Zumdahl Chemical Principles 5th Edition?

The version in the picture (with a photo of Welch Hall) is the special edition "custom" printed specifically for the Universisty of Texas Chemistry Department. What's so great about it? It has a flypage with the order of Chapters listed for CH301 and CH302. We do not follow the normal ordering (1, 2, 3, ...). So this is helpful - although not perfect, we could easily change the ordering. This Edition (ISBN:0547005962) includes an EduSpace passcode. There is a companion web site that goes with this book. To have access to the web site you must have a passcode. This edition of the book includes a passcode for you to use to gain entry to this special web site. This Edition is Sold to the Bookstore (UT Co-op) CHEAPER than the regular (non-UT) version. So you are able to buy a brand new textbook about $30 less than what you would normally pay. Plus you get a great tutorial site for extra help.

There is another "regular" (printed for the masses) 5th edition textbook. This edition is available in all sorts of places. I've seen various ISBN numbers also. Amazon has this book available as well as other web sites for books. It is EXACTLY the same book except for the cover and flypage. When you purchase this version of the book, you will NOT get an EduSpace passcode and will therefore NOT be able to access that web site. However, Amazon sometimes DOES get the version with the EduSpace passcodes - best to read carefully what you do and don't get. So do you care if you can access the EduSpace website? Maybe, maybe not. The site DOES have very useful information if you chose to go there and take the time to look. Does any of your grade depend on that web site? No. So you could use this book and save some money if you find it used somewhere. Just know that you will not have access to the EduSpace web site.

iClicker Registration

This link will take you to the iClicker Registration Site.

If your iClicker is already registered (from last semster or another class) you need not register again.