1. How many grams of sucrose (C12H22O11) are needed to lower the freezing point of 1000 g of water
by 3.00°C? (4 points)
(a) 12.3 g sucrose
(b) 552 g sucrose
(c) 1030 g sucrose
(d) 184 g sucrose
(e) 1.91 g sucrose

2. Consider the following reaction: (3 points)
SO2Cl2 (g) SO2 (g) + Cl2 (g)
Suppose the reaction starts with an initial SO2Cl2 concentration of 0.200M and no SO2. The
concentration of SO2 increases to 2.46 × 10 – 2 M over a period of 1 h 40 min. What is the rate of
reaction?
(a) 1.32 × 10 – 1 M / min
(b) 4.92 × 10 – 3 M / min
(c) 1.89 × 10 – 2 M / min
(d) 2.64 × 10 – 4 M / min
(e) 1.85 × 10 – 1 M / min

3. What is the rate constant, k, for the above reaction? (3 points)
(a) 1.32 × 10 – 3 / min.
(b) 9.25 × 10 – 1 / min.
(c) 2.46 × 10 – 2 / min.
(d) 9.46 × 10 – 2 / min.
(e) 6.60 × 10 – 1 / min

4. What is the concentration of hydronium ion (H3O+ ) in a 0.100 M solution of acetic acid?
The Ka of acetic acid is 1.8 × 10 – 5 (5 points)
(a) 4.2 × 10 – 3 M
(b) 3.2 × 10 – 12 M
(c) 1.8 × 10 – 6 M
(d) 1.8 × 10 – 4 M
(e) 1.3 × 10 – 3 M

5. The Ka of lactic acid is 8.4 × 10 – 4. What is the pKa? (5 points)
(a) 8.4
(b) 3.07
(c) – 4.00
(d) 12.4
(e) 4.4