Sample Problems for LT3

1. 5.00 L of 0.169 M solution of Au2(SO4)3 is electrolyzed with a current of 13.0 amperes for 80.4 minutes. Gold is plated on the cathode. What mass of gold is produced?
2. An aqueous AgNO3 solution has a concentration of 0.1 M. one liter of the solution is electrolyzed by a constant current of 0.10 ampere for 10 hours.
a. What weight of silver metal is deposited at the cathode?
b. What volume of dry oxygen gas, measured at STP, is liberated at the anode?
c. What is the molarity of the silver ion in the solution at the end of the electrolysis?
3. Give the net reaction and half reactions for the electrolysis of molten CoCl¬2 and aqueous CoCl2. (please look up E0red)
4. Review discussion on corrosion.

Electrochemistry Lecture Notes Part 1

C3ElectrochemLecNotes1

First Sem Chem 3 Grades

First Sem Chem 3 Grade

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Breakdown will be available on Nov. 9

Electrochemical Cell

interactive video

Study Pointers for Chem 3 Perio

1. MAKE SURE YOU UNDERSTAND ALL CONCEPTS THAT WERE DISCUSSED
 When is a chemical reaction in a state of equilibrium?
 What factors affect a system in equilibrium? How does each factor affect the direction of the reaction, the amount of reactants and products, and the value of Keq?
 What are the different definitions of acids and bases and how do they differ?
 What acid strength trends are followed by binary acids? Oxo/oxyacids?
 Why do aqueous solution of salts exhibit acidic, basic, or neutral properties?

2. MAKE SURE YOU KNOW HOW TO…
 Write Keq expression (Kc and Kp) for homogenous and heterogeneous reaction
 Relate Kc and Kp
 Solve Keq problems
 Determine the direction of a system approaching equilibrium (Q vs. Keq)
 Solve for new Keq when a given reaction is manipulated
 Solve for hydronium and hydroxide concentrations, pH and pOH of strong and weak acids and bases.
 Solve for % ionization/dissociation

Problem Set

Exercises

ab

MIT OCW lecture

Lecture 21: Acid-Base Equilibrium

Catherine L. Drennan

pH and pOH

interactive lesson

AB PS2

abPS2

Reading Assignment and Problem Set

Please view the presentation and/or read 18.6 in your text book. Prepare for Problem Set on our second meeting of the week. The coverage of LT 5 will only be 18.6 and 18.7.

AB Lecture Notes Part 1

C3ABLecNotes1

Expt 4: Hydroxides of 3rd Row Elements

Expt 4 (PreLab, Data Sheet, PostLab)

Le Chatelier's Sample Exercise

C3ChemEqLeChatEexercises

Le Chateliers Lecture Notes and Expt 3

C3ChemEqLecNotes3
Expt 3: Hydrolysis of Salts (Pre-lab, Data Sheet, Post Lab)

ICE Problem Set and Answer Key

ICE Problem Set
ICE Problem Set Answer Key

Le Chatelier's Principle

Video Lecture with Interactive Simulation

Effect of Concentration, Pressure, and Temperature of Different Equilibrium Systems

Acids and Bases & RedOx Lecture Notes

You can now download a copy of the powerpoint presentations and pdf from the slideshare sidebar.

More ICE Exercises

You are not required to submit your answers to the following exercises but I expect you to solve the following problems to help you prepare for the Problem Set and Long Test. No solutions will be posted for these exercises.
Chemeq ICE Additional Exercises

July 13-17

Day 1: Discussion of ICE exercises and Quiz

Day 2: Problem Set 2 NO CLASSES

Day 3: Experiment 2: Chromate-Dichromate Equilibrium System. Submit PreLab before we start. Data Sheet will be submitted by group at the end of the period. Bring your own copy. No lab gown and PreLab, No experiment! Automatic zero in the lab performance.

• Pre-Lab
• Data Sheet
• Post-Lab ( due on the second meeting of the following week)

NO CLASSES

Answer Key to ICE Exercises excluding 5 & 7

ICE exercises Answer Key

Homework#1 for Chemis3 students under Ms. B

Answer the ICE exercises in the previous post. Answer numbers 5 and 7 in a short bond paper and submit by 7:30 a.m. on Monday. Show complete solution and box final answers.

Answers and solutions to ICE Exercises (5 & 7 not included) will be posted. NOTE: Your solution may be different from what will be given but it doesn't mean it's incorrect.

Sample Problems on Chemical Equilibrium

C3ChemEqICEexercises

Chemical equilibrium Notes Part 2

C3ChemEqLecNotes2

Problem Set 1

PS1

More Exercises

Chemeq_part1 Additional Exercises

Chem Eq Lec2

Chem Eq Lec2v3

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Lecture Presentation Part 1

Chem Eq Lec1

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Chemical equilibrium Lecture Notes Part 1

C3ChemEqLecNotes1

Equilibrium, Equilibrium Constant, and Law of Mass Action

Chem Eq Cs

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June 22 - 26

Post - Lab due on our first meeting.

CHEMICAL EQUILIBRIUM

Lecture Outline Part 1 (17.1 - 17.4 of your text book)

• What is Chemical Equilibrium

§ Condition at which equilibrium exist

ü Thermodynamic approach

ü Kinetic approach

• Equilibrium Constant & Reaction Quotient

§ Law of Mass Action

§ Rules in writing Keq and Q expression

üfor Homogeneous and Heterogeneous Reactions

ü relating KC and KP in an equation

• Predicting direction of a reaction to achieve equilibrium

§ quantitative comparison of Keq and Q

Video of Nitrogen Dioxide - Dinitrogen Tetroxide Equilibrium

Click the link below to see the effect of adding liquid nitrogen to a closed system of NO2 - N2O4 system. Challenge Question: What is the blue compound formed in the last part of the video?

no2.mov

interactive animation

Chemical Hazards and Risks

Risk and hazard

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from http://www.dehp-facts.com/upload/documents/webpage/document52.pdf (accessed June 15, 2009)

June 15-19

Day 1: Orientation and Release of Glasswares - There will be only 5 groups in a class. Members will be chosen randomly. Post-laboratory Reports will be submitted by group but pre-lab. will be done individually and submitted before the start of the experiment. Laboratory Guidelines in Chemistry

Day 2: Experiment 1: Nitrogen Dioxide - Dinitrogen Tetroxide Equilibrium System. Submit PreLab before we start. Data Sheet will be submitted by group at the end of the period. Bring your own copy. No lab gown and PreLab, No experiment! Automatic zero in the lab performance.

• Pre-Lab
• Data Sheet
• Post-Lab ( due on the first meeting of the following week)

Day 3: Group Activity & Discussion

Chemis3 Powerpoint Presentation

Powerpoint Presentation in Senior Re-orientation Program

Chemistry 3

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Welcome to Chemis3

Chem 3 is a one (1) unit subject for fourth year students of PSHS. The subject reviews previous lessons in Chem 2essons in Chem 2 (i.e. Kinetics) & discusses advance topics in chemistry, which includes equilibrium, acid-base reaction, electrochemistry & qualitative analysis. Lecture for each topic are supported by individual and group activities such as interactive softwares and laboratory experiments.

The Grading System, group requirements and tentative schedule of long tests and practical tests per quarter can be seen in the document below.

Chemistry 3 Outline

Publish at Scribd or explore others: Study Guides, Notes, School Work outline