midterm1a_sp06

midterm1a_sp06 - 1. [7 points] The solubilty of lead (II)...

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1. [7 points] The solubilty of lead (II) chloride is 1.6 × 10 -2 M. What is the K sp of PbCl 2 ? a. 5.0 × 10 -4 b. 4.1 × 10 -6 c. 3.1 × 10 -7 d. 1.6 × 10 -5 e. 1.6 × 10 -2 2. [7 points] The K sp for Zn(OH) 2 is 5.0 × 10 -17 . Determine the molar solubility of Zn(OH) 2 in buffered solution with a pH of 11.50? a. 5.0 × 10 6 b. 1.2 × 10 -12 c. 1.6 × 10 -14 d. 5.0 × 10 -12 e. 5.0 × 10 -17 3. [7 points] For which salt should the aqueous solubility be most sensitive to pH? a. Ca(NO 3 ) 2 b. CaF 2 c. CaCl 2 d. CaBr 2 e. CaI 2 4. [7 points] Which of the following reagents would increase the solubility of Ni(OH) 2 (s)? Ni(NO 3 ) 2 NaOH HCl NH 3 a. Ni(NO 3 ) 2 b. HCl c. 3 d. 3 e. None of these reagents will increase the solubility of Ni(OH) 2 5. [7 points] The solubility of CaCO 3 (limestone) is 9.5 mg in 1800 mL. What is the K sp of CaCO 3 (Formula Weight = 100.1 g/mol)? a. 2.8 × 10 -5 b. 2.8 × 10 -9
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5.2 × 10 -5 d. 5.2 × 10 -9 e. 3.8 × 10 -7 6. [7 points] What is the pH of a saturated solution of Cu(OH) 2 (K sp = 2.6 × 10 -19 )? a. 7.9 b. 7.6 c. 6.1 d. 9.2 e. 8.8 7. [7 points] The solubility of iodide ions in a saturated solution of lead (II) iodide (K sp = 1.4 × 10 -8 ) is _________? a. 3.8 × 10 -4 b. 3.0 × 10 -3 c. 1.5 × 10 -3 d. 3.5 × 10 -9 e. 1.4 × 10 -8 8. [7 points] In which one of the following solutions is silver chloride the most soluble? a. 0.181 M HCl solution b. 0.0176 M NH 3 solution c. Pure water d. 0.744 M LiNO 3 solution e. 0.181 M NaCl solution 9. [7 points] A solution contains three anions with the following concentrations, 0.20 M CrO 4 2- , 0.10 M CO 3 2- and 0.01 M Cl - . If a dilute AgNO 3 solution is slowly added to the solution what is the first precipitate to form: Ag 2 CrO 4 (K sp = 1.2 × 10 -12 ), Ag 2 CO 3 (K sp = 8.1 × 10 -12 ), AgCl (K sp = 1.8 × 10 -10 )? a.
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This note was uploaded on 06/03/2011 for the course CHM 123 taught by Professor Woodward during the Spring '08 term at Ohio State.

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midterm1a_sp06 - 1. [7 points] The solubilty of lead (II)...

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