Arkansas State University Department of Chemistry and Physics

1. Calculate the equilibrium concentrations and pH for a 0.20 M proprionic acid solution.
K_a = 1.3 x 10^-5

2. Calculate the equilibrium concentrations and pH for a 0.20 M carbonic acid solution.
 Compare the answer to problem 1. Note which has the higher K_a and lower pH.
K_a = 4.2 x 10^-7

3. Calculate the K_a for a 0.3 M solution of HA (weak acid) if the pH = 3.65

4. Calculate the pH for a 0.2 M pyridine solution. K_b = 2.0 x 10^-9

5. Calculate the pH of a 0.34 M HCl solution.

answers