Begin CH302 Spring 2011 Practice Quiz 1 |
1) The vapor pressure of water at 25C is 23.76 Torr and its standard enthalpy of
vaporization at that temperature is 44.0 kJ mol 1. Estimate the vapor pressure of water
at 40C (in Torr.)
Answer
Answer: 55
2) Which
CH 302 13 Answer Key
More Advanced Electrochemistry Problems
1. (a) Calculate the mass of copper metal produced at the cathode during the passage of
2.50 amps of current through a solution of copper (II) sulfate for 50.0 minutes.
2e
Cu
(reduction/cathode
CH 302 Worksheet 13 More Advanced Electrochemistry calculations
1. (a) Calculate the mass of copper metal produced at the cathode during the passage of 2.50 amps of current
through a solution of copper (II) sulfate for 50.0 minutes.
(b) What volume of oxy
CH 302 Worksheet 10 Answer Key
1. NaH2PO4 (conc. = CNaH2PO4) is dissolved in water. Write the mass balance equation for this system.
Answer: CNaH2PO4 = [H3PO4] + [H2PO4-] + [HPO42-] + [PO43-]
2. Write the charge balance equation for the solution in questi
CH 302 Worksheet 10
1. NaH2PO4 (conc. = CNaH2PO4) is dissolved in water. Write the mass balance equation for this system.
2. Write the charge balance equation for the solution in question 1.
3. Write the charge balance equation for a solution containing a
CH302 Worksheet 8 How to Systematically Work Harder and Harder Acid Base
Calculations Exactly the Same Way: Proof that the Seven Steps to Solving Acid Base Problems Work
1 Remove the spectator ions
2 Are there any strong acids or bases
3 Are there any wea
CH302 Worksheet 8How to Systematically Work Harder and Harder Acid Base Calculations Exactly the
Same Way: Proof that the Seven Steps to Solving Acid Base Problems Work
1 Remove the spectator ions
2 Are there any strong acids or bases
3 Are there any weak
Worksheet 7More Solubility Problems Answer Key
1. A solution is made with NaI and NaCl such that it is 0.01 M in both I- and Cl-. To 1 L
of this solution 0.01 moles Ag(NO3) are added (you can ignore any volume change). The
NaI, NaCl, and Ag(NO3) are compl
Work Sheet 7 More Solubility Equilibria
1. A solution is made with NaI and NaCl such that it is 0.01 M in both I- and Cl-. To 1 L
of this solution 0.01 moles Cu(NO3) are added (you can ignore any volume change). The
NaI, NaCl, and Cu(NO3) are completely s
CH302 Worksheet 6 Answer Key
20 questions involving simple water equilbria and the approximations that make them simple.
1. The only water equilibrium for which we make no approximations is the case of pure water (amazing how
simple something is when you
CH302 Worksheet 6
20 questions involving simple water equilbria and the approximations that make them simple.
1. The only water equilibrium for which we make no approximations is the case of pure water (amazing how
simple something is when you dont add an
CH302 Worksheet 5 Answer Key: A charming calculator-free worksheet concerning K sp, Kw, Ka & Kb
and strong acids and bases.
1. Define Ksp for the dissolution of the following salts in water. If necessary, write a
balanced chemical equation for the dissolu
CH302 Worksheet 5: A charming calculator-free worksheet concerning K sp, Kw, Ka & Kb
and strong acids and bases.
1. Define Ksp for the dissolution of the following salts in water. If necessary, write a
balanced chemical equation for the dissolution first.
Worksheet 4: Identifying Types of Acids and Bases.
As quickly as possible, identify the compounds below by type of acid or base and the
symbol to be used in an acid or base calculation (answer key below)
Possible types of acid or base answers:
strong acid
CH302 Worksheet 2Colligative Properties
All of this is intended to be done without the aid of a calculator. All of the calculations are designed such
that approximating should be straight-forward and produce a correct result.
1. Based on the physical cons
CH302 Worksheet 1 Answer Key
For Questions 1-4, use the Phase diagram below.
1. What is a good general definition of the term triple point? How many triple points are found int he
phase diagram for quartz shown above?
A triple point is any point at which
CH302 Spring 2009 Worksheet 2.
For Questions 1-4, use the Phase diagram below.
1. What is a good general definition of the term triple point? How many triple points are found int he
phase diagram for quartz shown above?
2. How many phase boundaries are th
CH302 Worksheet 0 Answer Key: A Little Thermo Review
1. What two processes (a.k.a. path functions) can transfer internal energy between a
system and its surroundings? What symbols are used for these variables?
Heat and work. q for heat and w for work.
2.
CH302 TA Practice Quiz 1 Answer Key
1. An unknown liquid is 2000 Pa at 25 oC and 7500 Pa at 50 oC. Based on the ClausiusClapeyron equation which expression below could be used to solve for the enthalpy of
vaporization (Hvap) of the unknown liquid?
1. [(8.
CH302 TA Practice Quiz 6 In principle this can be done without a calculator if you use the hints provided and a
piece of scratch paper.
Note: ln 2 = .693
1. Consider the reaction below. Which of the following is the correct rate expression?
2A + B 2C
a. -
CH302 Spring 2011 Practice Quiz 3The TA Version
1. Which of the following pairs of solutions would result in a buffer upon mixing?
1. 25 mL of 4 M HCl & 15 mL of 4 M HNO2
2. 200 mL of 0.5 M LiOH & 100 mL of 0.5 M H2SO4
3. 100 mL of 1 M NH3 & 10 mL of 10 M
CH 302 TA Practice Quiz 2-Answer Key
1. Determine the correct equilibrium expression for the reaction of hydrogen gas with nitrogen gas to
produce ammonia gas. (You will need to write the balanced reaction yourself)
a.
b.
c.
d.
Kp = cfw_PN2 PH22 / PNH33
K
CH 302 TA Practice Quiz 2
1. Determine the correct equilibrium expression for the reaction of hydrogen gas with nitrogen gas to
produce ammonia gas. (You will need to write the balanced reaction yourself)
a.
b.
c.
d.
Kp = cfw_PN2 PH22 / PNH33
Kp = PNH33 /
CH301 Spring 2011 TA Practice Quiz 5
1. In which of the following polyatomic ions does the chromium atom have an even oxidation state?
I. CrO42II. CrO2III. CrO22+
1. I only
2. II only
3. III only
4. I and II
5. I and III
6. II and III
7. I, II and III
2.
CH302 Spring 2011 Practice Quiz 6-calculator free
1. Consider the reaction found in the Haber process. Write down the rate expressions for the
three compounds found in the reaction. Which of the following statements is false:
A. The coefficients found in