Exam 3B, Spring 2004

1. Complete and balance the following reactions:

a. H₂SO₄(aq) + CsOH(aq)

b. CH₃CH₂NH₂(aq) + H₂O(l)

c. H₃AsO₄(aq) + H₂O(l)

d. Cu(NO₃)₂(aq) + Li₂S(aq)

e. HClO(aq) + CN^–(aq)

f. Mn²⁺(aq) + H₂O(l)

g. Ni(ClO₄)₂(aq) + NaOH(aq)

2. For each of the following salts, indicate if an aqueous solution will be acidic, basic, or neutral. If the salt is not neutral, write the reaction that determines the acidity or basicity.

a. KBr

b. Fe(ClO₄)₃

c. Na₂CrO₄

3. A solution is made that is 1.0 mM NaH₂AsO₄ and 1.0 mM Na₂HAsO₄ at 25 °C.

a. Calculate the pH of the solution.

b. Calculate the pH of the solution after 0.010 mmol of NaOH is added to 1.0 L of the solution.

c. Calculate the pH of the solution after 0.10 mol of NaOH is added to 1.0 L of the solution.

4. Calculate the molar solubility of lead hydroxide in pure water at 25 °C.

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