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CHM 112, Section 1
Spring 2000
Exam 2A
 
 

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

a. C6H5NH2(aq) + HCl(aq)

b. C3H7COOH(aq) + H2O(l)

c. (CH3)3N(aq) + H2O(l)

d. HNO2(aq) + NaOH(aq)
 
 

2. Find the pH, pOH, [H3O+], and [OH] for the following solutions at 25 oC.

a. 0.015 M perchloric acid.

b. 3.1×10–4 M calcium hydroxide

c. acetic acid solution with pH = 4.51

d. ammonia solution with pH = 11.68

e. 0.00028 M sodium hydroxide
 
 

3. Indicate the stronger acid in each pair. Explain your reasoning in 5 words or less.

a. HNO3 vs. H2SO4

b. CCl3COOH vs. CH3COOH

c. H2Se vs. H2Te

d. H2SeO4 vs. HSeO4
 
 

4. Find the pH of a 0.072 M solution of hypoiodous acid, HOI. Show the appropriate chemical reaction required to solve the problem.