CHEM 1451 Daily Outline


Apr 28   8-10 am   Final Exam   key   Final review sheet     93.8 <68.4> 37.9

Your final is yours to have once you see the grade posted in Bb. 

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Course grade What If? calculations

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Study sessions before the final:

Thu Apr 24  10 - 11 am  MAN 105

Fri Apr 25 10 - 11 am MAN 105    and     3 - 4 pm  MAN 101

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Thu Apr 24   240 - 340 pm   MAN 105   SI with Lulu Quebedeaux  

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Self assessments in    (work them with a timer)

Ch 18  p 863  allow 30 min, nothing omitted

Ch 19 p 913  allow 25 min; omit 9, 10, 14, and 15

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Wed Apr 23   3 - 4 pm   MAN 105   SI with Lucas Yarbrough  

Electrolysis    

Counting electrons, stoichiometry with coulombs


WORK remaining Ch 19 as assigned on syllabus

Because we did not discuss "counting electrons," omit 99, 101, 116 from the assigned HW.

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Tue Apr 22   LAB =  Electrochemical cells (available on the lab downloads page)

"Neatly written" is a challenge for several of you; poor handwriting seems a badge of honor for some.

I won't accept poorly written or organized work.  Make the right effort this one time.


Divide your written submission into the following sections:

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Mon Apr 21

Duracell batteries

Li batteries from AR

Li battery slides    Baghdad battery 250 BC

Fuel cells

Living cells are batteries, cellular respiration is a battery      slide summarizing this

Electrolysis (not hair removal)


WORK Ch 19   86, 89-95 as assigned on the syllabus

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Fri Wed 18

Quiz 10     key

question 19.85  example here

E at biochemical conditions (in your cells, etc.)     bring this slide

Batteries!!   Spontaneous product favored redox reactions

Redox jargon   battery jargon


READ Sec 19.1 - 19.5, 19.7-19.9

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Thu Apr 17
240 pm MAN 105   Lulu Quebedeaux SI

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Wed Apr 16

Oxidant and reductant   strong vs weak

Standard potentials   Table 19.1

Redox jargon

Reducing agent is oxidized.  Oxidizing agent is reduced.  See this video.

Cell potentials

E, G, and K


3 pm MAN 105  Lucas Yarbrough SI

WORK Ch 19:  3-48, 61-68, 85,86

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Tue Apr 15     In MAN 101 all day

bring a copy of this to work during the lab period   this will be graded for lab points

Also bring this example to work

Carefully read Sec 8.9 and 19.2 and watch these three videos before coming to lab.

Oxidation numbers   (12:55)
Redox balancing (acid conditions)  (5:55)

Redox balancing (basic conditions) (2:39)

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Mon Apr 14

delG = delH - TdelS   all possible combinations

enthalpy driven vs entropy driven     

delG at nonstandard conditions       bring this example

when Q = K or Q < K or Q > K


WORK Remaining Ch 18 as on syllabus

READ Sec 19.1 - 19.5

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Fri Apr 11

Quiz 9   key   Hess' Law, using App II, meaning of delS      (FYI  Quiz 10 will be Apr 18)

Will it happen, yes or no?       bring these slides

delS of the universe

2nd Law of thermodynamics

delGfo    understand what the f and the o mean


READ  Ch 18

WORK Ch 18: 5-70, 87-89, 97 as assigned on the syllabus

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Wed Apr 9

Meaning of S      bring these slides

s, l, g

dissolving of (s) different from (g)

molecular complexity

NaCl vs MgO (and ideas from Ch 3)

3rd Law of thermodynamics

2nd Law


READ  Sec 18.1-18.7

WORK Ch 18:  5-12, 27-36, 50-58 as assigned on the syllabus

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Tue Apr 8   LAB =  KNO3 Ksp thermodynamics (available on the lab downloads page)

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Mon Apr 7
How Andy Fritz ate the sun

How delH, delG, delS are the same     bring these slides

State functions   

Hess' Law    bring these slides to use in lecture

Appendix II   remember using it in Ch 9, we'll use it again now

How S is different

REREAD Sec 9.8, 9.10
READ Sec 18.1-18.5
REWORK 9.58,75-78,87
WORK Ch 18: 5, 8, 27

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Fri Apr 4   Exam 4   Ch's 16, 17    key     comments    100, 98, 97, 95, 95 <74.6> 45, 42, 38

66 (!!) students in the class watched Ex3 comments.

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Wed Apr 2

Due first thing in lecture AR Chem HW #4 Dicamba volatility 

PbCrO4 in cinnamon   

How not to kill a patient with Ba when you order them to undergo GI X-ray imaging

Some (s) show pH dependent solubility (A/B salts, again, from Ch 16)


WORK: remaining Ch 17 as assigned on the syllabus

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Ch 17 Self assessment quiz as a practice test.  All questions fair game.  Allow 45 min.

I assume people are working these with a timer and that they are not looking at the answers while doing this.

This is the only way to earn maximum benefit from this practice.

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Tue Apr 1 (no fooling)   LAB =  KHT Ksp (available on the lab downloads page)

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"Decide what you like, and do it!"    Madeleine Joullie  U. of Pennsylvania

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Mon Mar 31  

Ksp  another kind of equilibrium constant     bring these to lecture

Revisit Q 2 from Exam 3  Dow magnesium process

Ch 13 jargon again (saturated, unsaturated, supersaturated)

PPT forms means:  Q > K, Q = K, Q < K  (choose one)


READ Sec 17.5, 17.6

WORK Ch 17:   89-105 as assigned on the syllabus

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Mar 24 - Mar 28   Spring Break                             

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People wanting to check their understanding of today's alanine example can work

this example problem         and check their answers here 

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Fri Mar 21

Quiz 8  key     Buffers

Acid / base titrations     titration summary

Sketch titration curve for H3PO4 + KOH   bring this slide

Amino acids, multiple pKa's   bring this slide


WORK Ch 17: 3-86 as assigned on the syllabus

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Wed Mar 19

Acid / base reactions   "Why are titrants always strong acids or bases?"

Acid / base titrations     titration summary


READ again pp 358-360 for a Ch 8 titration refresher

READ also Sec 17.6-5
WORK Ch 17: 60-71 as assigned on the syllabus


Bring your copy of Exam 3.  Some points may be returned, but I need to see your copy to do it.


AR Chem HW #4 Dicamba is posted and due Apr 2

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Tue Mar 18   LAB =  Making buffers (available on the lab downloads page)

Walk in the door knowing what masses of what solids and what solution volumes
you will need to make your pH = #.# buffer.  Remember, the lab says all will be making [acid] = 0.1 M.

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Mon Mar 17

How do buffers work    NH3/NH4+ example

dissolving 3.08 g of NH4Cl in 50.0 mL of 0.20 M NH3(aq). Assume 50 mL of solution.

Bring this work to lecture for reference

READ  17.2 - 17.5

WORK 17: 3-8, 25-58 as assigned on the syllabus

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Some of you may be interested in grade calculation tool I have posted on our course main website.

This allows you to use your category %'s and do some what if calculations heading into Exam 4 and the final.

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Fri Mar 14

What is a buffer?    I suggest bringing the buffer lab to lecture Fri and Mon

Recognize them when you see one.

How do you make one?

dissolving 3.08 g of NH4Cl in 50.0 mL of 0.20 M NH3(aq). Assume 50 mL of solution.

Bring this work to lecture for reference
     Buffer Equation

How do they work?    bring this file

READ  17.2 - 17.4

WORK 17: 3-8, 25-58 as assigned on the syllabus

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Wed Mar 12    Exam 3   key    comments    Ch 15, 16    98, 96, 95, 95, 95 <75.0> 54, 47, 42


Normally on Wed we have 1 pm office hours in 105.  On Mar 12 I am taking my wife the doctor in LR.

Because we will just have had an exam, I assumed few would come to the 1 pm session.
This Wed Mar 12 1 pm session is cancelled.  Email me if you have questions.

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Advice for doing well on Exam 3

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Ch 16 assessment quiz on page 756  (Omit 3) allow 25 min

Ch 15 assessment quiz on page 699   allow 30 min

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Tue Mar 11    Location MAN 101 all periods

Due first thing in your lab period, your lab from last week (pH Titration of a weak acid)

Lab work day  you will be working lots of Ch 15 and 16 questions.  Your exam is tomorrow.


My work here for the BF3  NaF example

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Ch 16 assessment quiz on page 756  (Omit 3) allow 25 min

Ch 15 assessment quiz on page 699   allow 30 min

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Mon Mar 10

Quiz 7   key   Ch 16 problems and concepts

pH of Salts (review polyatomics and formulas of ionic compounds, Ch 8)

Bring this slide       and also this slide   my answers for salt pH

Lewis acids and bases in more detail


WORK: Remaining Ch 16 as assigned on the syllabus

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Fri Mar 7

polyprotic acids/bases    successive K's    my work for H2CO3(aq)

pH of Salts (review polyatomics and formulas of ionic compounds, Ch 8)

Bring this slide       and also this slide


WORK Ch 16: 103-121 as assigned on the syllabus

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Wed Mar 5

Due first thing in lecture AR Chem HW #3 Blanchard Springs chemistry 

Ka, Kb, pKa, pKb    bring this slide    
some might want to watch this again    Adding reactions video summary (5:50)
ICE charts again

"the approximation"  x can be small, not zero, but small


WORK Ch 16: 45 - 102 as assigned on the syllabus

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Tue Mar 4    LAB =  Weak acid titration to determine Ka (available on the lab downloads page)

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Mon Mar 3

Quiz 6 again key

Bring a good calculator and don't be late.

Kw, pH, pOH

Relative strengths with K  Ka, Kb weak acids and bases

and ICE charts (again)


WORK Ch 16:  25-66 as assigned on the syllabus

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Fri Feb 28

Quiz #6  key   ICE problems from Ch 15

Common weak acids
Common weak bases
Conjugate acid/base pairs


WORK: 45-61 as assigned on the syllabus
READ: Ch 16

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Wed Feb 26

Lechatelier practice   bring this slide to use

K meaning  slides on meaning of K

Acids / bases   Bronsted-Lowry vs Lewis     slides you might want


Work 16: 3-8, 31-38 as on syllabus 


AR Chem HW #3 Blanchard Springs chemistry is posted and due next Wed Feb 5
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Tue Feb 25     LAB =  LeChatelier's Principle Equilibrium  (available on the lab downloads page)

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Mon Feb 24

More ICE problems:  51, 58, 81
What happens to (g) equil when volume changes


WORK: Remaining Ch 15 as assigned on the syllabus
READ Ch 15 and Sec 16.2-16.5

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Fri Feb 21

Quiz #5 equilibrium    key   ICE charts will not be on this quiz

How much does it shift, what are the concentrations when you get there?
I  C   E charts  (you will does these kinds of calculations for the next 3 chapters)

We will be working  lots of
1) which way does it shift and
2) what are the concentrations when it gets there. 
Come ready to work.  I hope that you will use this weekend wisely to 

practice as many ICE style questions  as you can ahead of next week's busy week.


WORK Ch 15:  44-64,77-82 as assigned on the syllabus
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Wed Feb 19   another remote day (see your email)

How we will do today.

At 10:00 am I will open this zoom link to do Q & A.  

https://uca-edu.zoom.us/j/8834692445?pwd=VDYwSjloOUdlOVFWdVZ4R3VKT004Zz09

I strongly suggest you bring your questions re. K etc. to this session.  I will answer any questions

about the HW suggested below.  You can even do screen grabs of all we write.

Manipulating K values

Kp vs Kc     using PV = nRT from Ch 10    video summary (6:07)

K involves numbers  (8:30) that must agree with the value of K

Q vs K at equilibrium or not?  (9:36)

This video (1:51) shows an equilibrium--2NO2(g, brown) --> N2O4(g, colorless)

That changes in response to temperature


At 1:00 pm I will reopen the same Zoom link above for more Q&A.

It is my expectation that you are using this remote instruction day to watch the videos that would have been lecture.

You would be expected to successfully be quizzed over this information on Friday.


WORK Ch 15 : 3-14, 21 - 44 as assigned on the syllabus
READ: all of Ch 15
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Tue Feb 18    ALL LABS CANCELLED FOR FEB 18.  

Bad weather prompted UCA campus to declare a remote instruction day.  We don't do labs remotely.

We are therefore punting this lab until NEXT Tue Feb 25.  Plan to do it then.  Enjoy this day away from lab.  

I will be answering email all day and am happy to zoom with any individual student interested in 1 on 1 help

they've not been able to receive during very busy office time.  


This means the Keq by spectroscopy lab will not be done this semester (because it will be replaced by LeChatelier).


WEBSITE alert

For a mysterious reason, all of the hyperlinks disappeared.  I am slowly repopulating them this morning.

Email me if there is one you need but can't find below.

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Mon Feb 17

What is Equilibrium
Meaning of K     
How large is large, how small is small
Writing K expressions (no s or l)

Manipulating K values

reverse reaction

multiply reaction by n

adding reactions


READ Sec 15.1 - 15.5

WORK Ch 15: 21 - 28 as assigned on the syllabus


Mon SI update

After some great effort to staff 4 pm SI, we have all failed to find a person to do it.

Because your tuition is paying for this help, I will make this 4 pm SI in RM 105 another office hour.

That means I will now be there every Mon at 4 pm in MAN 105.  Sorry for the trouble; thanks for your patience.

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Fri Feb 14

Exam 2  (Ch 13 and 14)    key    comments     99  (11 students scored 99 - 90) <66.3>   22 (11 students scored 22-43)

Will be provided:  anything from Ch 13 on the last exam
p 629 from Ch 14,  Arrhenius Eqn, a periodic table

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Using the Self Assessment quizzes in the book like practice tests.

Most students need to practice test taking, practice thinking clearly and strategically when the clock is ticking.  These Assessment Quizzes offer this.   DO NOT check the answers until after you have worked them all with a timer.  I suggest working with someone to keep you accountable.  Then check your answers and see me with any questions.

Ch 14   Omit Q 9,10.  Allow 25 min for these.    You may have to use tables in the chapter to work some of these.

"Omit" refers to questions over content we did not discuss or that I would never have asked.

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My work for Ch 13 #118   This assumes you have already worked to find i (Vant Hoff) in the problem.

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Web Feb 12
DUE first thing AR Chem HW #2   Tritium in Lake Dardanelle 

Why T affects reactions     Some notes from today

Why catalysts affect reactions

Arrhenius:  k, T, Ea all in one

Catalysts   homo vs hetero


WORK Remaining Ch 14 as assigned on syllabus

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Tue Feb 11     LAB =  bleach, dye kinetics  (available on the lab downloads page)

Come prepared:  shoes, pants, goggles as per safety agreement 

Come with your prelab completed and ready to hand in first thing.  

Prelabs must be on separate sheets of paper, not printed on the back of anything. 

You will need to be able to graph data collected from the Spectrovis instruments.

Bring something to graph with.

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Mon Feb 10

Mechanisms some more     some mechanism notes
Rate limiting step

k:  T dependent and catalyst dependent   Why?

Ea


WORK remaining Ch 14 as assigned on the syllabus


This one day my normal 1 pm office hours are move to noon.  I have to be in Hot Springs by 2 pm Feb 10.

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Fri Feb 7

Quiz 4 kinetics     key

mouse PET image of blood      bring these problems to work in class

C-14 dating

Mechanisms: HOW chemical reactions take place    a mechanism movie

Molecularity of steps

What makes a good mechanism     some mechanism notes


WORK Ch 14: 19, 81-84 as assigned on the syllabus

AR Chem HW #2   Tritium in Lake Dardanelle    Due Wed Feb 12

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Wed Feb 5

Integrated rate law [    ] vs time problems       bring these problems to work in class

p 629 summarizes

half life (constant ONLY for 1st order reactions)


WORK Ch 14: 51-64, 89-93 as assigned on the syllabus

READ Ch 14

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ACS celebrates black chemists and chemical engineers

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Tue Feb 4    All will meet in MAN 101.     Bring your text book.

DUE   Completed aspirin lab (data tables + postlab) in lab
We DO NOT need printed copies of the Beer's Law plot at all.  

Bring to this lab period a copy of the Feb 11 kinetics lab    Read it carefully before you come.  The prelab doesn't

have to be finished before you come. We will work problems like the prelab.  We will work kinetics problems like the ones that make up this lab.

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Mon Feb 3

Rates of reactions
Rate law, equation, expression
Rate constant

Reaction order      bring these kinetics T F Q's
Determining reaction rates:

     Relative rates method
     Integrated rates method    summary of plots, my version of p 629 in the book


READ Sec 14.1 - 14.5

WORK   Ch 14: 3 - 8, 27-68 as assigned on the syllabus

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Fri Jan 31   Exam 1    key    comments  94, 94, 90, 90, 90  < 68.7 > 43, 36, 26   (Ch's 11, 13)

will be provided:  

periodic table, delH= (mole)(delHprocess),  all heats of processes (Table 11.7 and 11.9),

P = (mole fraction)(Po)   vapor pressure of solutions

delT = m K i     and any values of Kf or Kb  (Table 13.6)

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Wed Jan 29
Due first thing in lecture, your written work for AR Chem HW #1  Li in AR

delT = mKi problems worked

what does i mean    electrolytes

gas solubility    bring these questions

osmosis

READ Sec 13.1 - 13.7  Omit sections on: Henry's Law, pp 585-6 (volatile solvent and solute)

WORK remaining Ch 13 as assigned on the syllabus

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Using the Self Assessment quizzes in the book like practice tests.

Most students need to practice test taking, practice thinking clearly and strategically when the clock is ticking.  These Assessment Quizzes offer this.   DO NOT check the answers until after you have worked them all with a timer.  I suggest working with someone to keep you accountable.  Then check your answers and see me with any questions.

Ch 11 p 516-517  Omit Q 8 and 9.  Allow 30 min for these.    You may have to use tables in the chapter to work some of these.

Ch 13 p 596-597  Omit Q8, 11, 14, 15.  Allow 30 more min for these.

"Omit" refers to questions over content we did not discuss or that I would never have asked.

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Tue Jan 28     LAB =  Aspirin analysis  (available on the lab downloads page)

Come prepared:  shoes, pants, goggles as per safety agreement 

Come with your prelab completed and ready to hand in first thing.  

Prelabs must be on separate sheets of paper, not printed on the back of anything. 

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Mon Jan 27

Colligative properties

Vapor pressure of solutions   bring these slides to lecture

delT = mKi

Fp depression    some questions we will use in lecture
Bp elevation


WORK Ch 13: 71-74, 79-81, 102 as assigned on the syllabus

AR Chem HW #1 Li in AR is posted and will be due on Wed in lecture

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Fri Jan 24
Quiz #3    key         the kinds of solution calculations like we did on Jan 21
Solution concentrations of every kind     heart imaging slides from Jan 22

molarity      molality

mole fraction

ppX     bring these to work during lecture     my work for the As example


WORK  3-9, 27-65, 103,104,109,110

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Wed Jan 22
IMF's and solubility   washing peanut butter away       extracting iodine

delH soln  vs   delHhydr   vs   delHlattice    salt hydrolysis slide

Saturated    unsaturated    supersaturated

Concentration units


READ Sec 13.1 - 13.7
WORK  3-9, 27-43
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Tue Jan 21    lab period = class work day   All sections meet in MAN 101

graphing assignment from Jan 14 due today in class  (not more than 3 pieces of paper, can be printed front/back)

phase diagrams examples will be worked:  CO2   and constant P, T processes

Bring a copy of next week's Aspirin lab  available on the lab downloads page

Bring these problems to work together as practice for Jan 28 Aspirin lab

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Mon Jan 20    Martin Luther King Day      no class today
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Progress toward a hydrogen economy.  The future is now.
https://www.socalgas.com/sustainability/hydrogen
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Fri Jan 17 

Quizzes #1 and #2    key   comments video posted here (Please watch it.  Some need to rethink how they are approaching this class.)
Phase diagrams

Normal bp, normal mp

Triple point

Constant T processes

Constant P processes

Uniqueness of H2O (again)   discussed ice skating and the role of high pressure


WORK  Remaining Ch 11 as assigned on the syllabus
READ Sec 13.1 - 13.5   to prepare for Mon lecture

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"No A for effort"   Adam Grant New York Times 12-26-2024    read full article here

"This is what worries me most about valuing perseverance above all else: It can motivate people to stick with bad strategies instead of developing better ones. With students, a textbook example is pulling all-nighters rather than spacing out their studying over a few days. If they don’t get an A, they often protest." 

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Emergency Textbook Grants

This semester, UCA is continuing its program to assist students facing extreme hardship or financial crisis with the purchase of their course textbooks.  

 

To apply, students should visit uca.edu/go/TextbookGrant and complete the online application. There will be an application period from January 6, 2025, to January 31, 2025, or until funds are exhausted, whichever comes first.  In past semesters, funds were exhausted within the first week.

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Some of your classmates asked for clarification on what I required my CHEM 1450 students to memorize and what they would be given or not given on exams or quizzes.  This summary is intended to answer that question.

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Wed Jan 15

Jacob Christie   UCA Tutoring Center    

Vapor pressure
Equilibrium vapor pressure

  Pvap and applications (13:34)

and IMF's

and normal boiling point

and relative humidity      a slide from lecture
    
WORK assigned Ch 11 HW 1 - 75 as assigned on the syllabus

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Tue Jan 14   LAB =  Intermolecular forces  (available on the lab downloads page)

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Office hour times have been established (based on top three times in the class survey).

Mon 1 - 2 pm MAN303B

Wed 1 - 2 pm MAN 105

Fri 8 - 9 am MAN 303B

These are all drop in times.  No appointment is needed.  At these we can do anything you want re. class and lab.
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Mon Jan 13

WATCH these lecture videos before coming to lecture

  phase changes and heat (16:03)

  vapor pressure (12:00)

IMF's and phase changes      my work posted here from the in-class problem
   The answer I got makes sense for 11.92.  A Tf between 100 and 5 deg C makes sense.
delHphase change

EAA, Safe at UCA   


READ Ch 11
WORK Ch11:  1-75 as assigned on the syllabus
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SI leaders for this semester
Jenna Whisenant     jwhisenant@cub.uca.edu

Sarah Hester     SHESTER@cub.uca.edu


Both will be attending our lectures.  

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Remote Instruction Plan (from the provost's office)

When inclement weather leads to a university decision not to hold on-campus classes, all decisions of the faculty member about remote instruction must be made in consultation with the department chair and within the following general framework:

Face-to-face classes may meet fully online, replacing in-classroom meetings with synchronous or asynchronous options. Asynchronous options are preferable, as we do not want to disadvantage students who do not have the necessary technology available. If the instructor opts to offer a synchronous, virtual meeting, it must be recorded and made available to the class to ensure each student has access to the meeting


Fri Jan 10    asynchronous lecture day due to snow
video going over syllabus and my class logistics
WATCH these lecture videos linked below.  See that together the are < a 50 min lecture period.  This would be one day of lecture.

IMF's   phrases      some slides from lecture

  induced dipole  (13:38)

  polar molecules (8:28)        some slides we'll use in lecture

  dipole-dipole (6:10)

  H-bonding (10:28)

  ion-dipole and summary (10:05)


READ Ch 11   (I also strongly recommend reviewing Ch5: Lewis dot, VSEPR shape, polar molecules)

WORK (after today) Ch 11:  9,35-46 as assigned on the syllabus   


    CLICK all over my website and the BB page so you know the location of ALL course resources.    

    REVIEW expectations I have about you from CHEM 1450   Quizzes #1 and #2 will be given
    WATCH this introductory video about me and our class
    COMPLETE  survey of preferred times for study sessions  (need this ASAP to settle schedule)

    COMPLETE online safety assignment preparation to work in lab on Tuesday
    SEND questions, concerns about the class, the book, my website, etc. to Desrochers