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EXAM 2B
Spring 2002

1. Complete and balance the following acid/base reactions. Label the acid, base, conjugate acid, and conjugate base for each reaction.

a. aqueous perchloric acid plus solid magnesium hydroxide

b. aqueous nitric acid plus water

c. HBr(aq) + CN(aq)

d. HClO3(aq) + H2O(l)


2. Write the chemical reaction needed to determine the pH and give the pH for the following solutions.

a. 0.0010 M hydroiodic acid.

b. 0.0010 M calcium hydroxide


3. Indicate the stronger acid in each pair. Explain your reasoning in 5 words or less. For the stronger acid, write out the balanced reaction of the acid with water.

a. CF3COOH vs. CH3COOH

b. H4SiO4 vs. H3PO4

c. HCrO4 vs. HMnO4


4. Complete the following reactions and indicate which direction equilibrium will favor:

a. HBrO2(aq) + ClO2(aq)

b. NH3(aq) + HF(aq)


5. A 0.0010 M solution of fluoroacetic acid (CH2FCO2H, Ka = 2.6×103) was prepared. Find the pH. Set the problem up and stop when you reach the stage to do algebra. Then find the pH based on the answers given on the first page. No work = no credit.