Simon Fraser University

CHEM 233

1. Which of the following chemical species has the largest ionic strength?
A 1 mM NaCl
B 1.5 mM NaCl
C 1 mM CaCl 2
D 1 mM CaSO4
2. Balancing the following reaction. How many electrons are transferred?
MnO4- + SO 2  Mn2+ + SO42-
A 2
B 5
C 8
D 10
E 12
3. Balance the following reaction at pH = 5. What would be the coefficient for H2 O in the
balanced reaction?
H2 O + MnO 4- + SO2  Mn2+ + SO42- + H+
A 2
B 5
C 8
D 10
E 12
4. For the given shorthand cell notation, Zn | Zn2+ (1 M) || Cu2+ (1 M) | Cu, which of the
following is correct
A the weight of cathode will increase
B the weight of anode will increase
C Over the time, [Cu2+
] will increase
D Over the time, [Zn2+
] will decrease