Question

1. Determine the Cell potential for

Cr(3+)(aq) + Cl2(aq) --> Cr2O7(2-)(aq) + Cl-(aq). Assume 1.0 M and all partial pressures are 1.0 atm.

a. 0.06 V

b. 1.50 V

c. 0.03 V

2. Determine the Cell potential for

Cu(2+)(aq) + Mg(s) --> Mg(2+)(aq) + Cu(s)

a. 8.83 V

b. 2.71 V

c. 4.45 V

3. Suppose you had a container with 3 separate bulbs filled with a gaseous compound. For this particular experiment you have 10 molecules filling the flask. What is the probability of finding all 10 molecules in one of the bulbs of the container?

1. 1/81
2. 1/59,049
3. 1/243

4. What is the ionic solid that has a Ksp value of 1.4x10^-7

a. NiCO3

b. PbCl2

c. PbI2

5. Calculate the solubility of silver sulfate (Ksp = 1.2x10^-5) in 0.10M AgNO3.

a. 5.4x10^-4 mol/L

b. 7.9x10^-4 mol/L

c. 1.2x10^-3 mol/L

6. What is the heat of vaporization for ethanethiol (C2H5SH), given that's it's boiling point is 35oC and its heat of vaporization is 27.5 kJ/mol?

1. 23.5 J/K * mol
2. 89.3 J/K * mol
3. 12.2 J/K * mol

7. Carbon is used as the reducing agent for Oxide ores:

Sb4O6(s) + 6C(s) --> 4Sb(s) + 6 CO(g) (Enthalpy value (H) = 778 kJ). What is the change in entropy for the surroundings (Delta Ssurr) at 25oC?

1. 2.16 J/K
2. 0.419 J/K
3. -2.16 x 10^3 J/K