Quiz 7a Practice, Chemistry 111, Lycoming College, Mar. 30, 2005, Dr. Mahler

Note – this incorporates the material from last week’s practice sheet:

Fair Game: All previous material (Ch. 11, 12, 13, 14, 15). New Material covered as of Monday, March 28 – Chapter 16 Sections 1, 2, 3, 4, 5. Relevant Homework: Ch. 16 Problems 19, 23, 26, 29, 33, 35, 38, 41, 45, 48, 51, 54, 57, 61, 64.

1) Possible essay / short answer type questions: Chapter 16 Review Questions 1 – 10 (page 727)

2) Determine K_sp for the following slightly soluble compounds, given their molar solubilities: a) AgI, 8.9 x 10^-9 M  b) Ca(OH)₂, 0.011 M  c) BaCrO₄ 9.0 x 10^-5 M  d) Hg₂Cl₂  5.2 x 10^-7 M.

3) From the K_sp value (look it up here and below) for the following slightly soluble compounds, calculate the molar solubility: a) AgBr  b) CaF₂ c) Ag₃AsO₄ (note was Ag₃PO₄ but this is not in our book for K_sp)

4) Calculate the molar solubility of AgCl in 0.20 M NaCl.

5) Decide whether a precipitate will form when the following solutions are mixed: a) 5.0 mL of 0.10 M KI and 1.00 L of 0.010 M AgNO₃  b) 1.0 mL of 1.0 M K₂SO₄, 10.0 mL of 0.20 M CaCl₂ and enough water to dilute the solution to 100.0 mL.

6) Problems 16.63 and 16.65.

(All keys on web: http://www.lycoming.edu/chem/spring2005/111/keys.htm)