stoltzfus_chem123_Midterm1_page1

stoltzfus_chem123_Midterm1_page1 - 3 K sp = 1.4 x 10-11 4....

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1. [7 points] The solubility product expression for Pb 3 (PO 4 ) 2 (s) is (a) [3 Pb 2+ ] 3 [2 PO 4 3- ] 2 (b) [Pb 2+ ] 2 [PO 4 3- ] 3 (c) [3 Pb 2+ ] 3 [2 PO 4 3- ] 2 /[Zn 3 (PO 4 ) 2 ] (d) [3 Pb 2+ ][2 PO 4 3- ] (e) [Pb 2+ ] 3 [PO 4 3- ] 2 2. [7 points] What is the molar solubility of Ag 2 CO 3 in water? (K sp = 8.1 x 10 -12 ) (a) 1.3 x 10 -4 M (b) 2.6 x 10 -4 M (c) 2.0 x 10 -4 M (d) 2.8 x 10 -6 M (e) 8.1 x 10 -12 M 3. [7 points] Which of the following slightly soluble salts has the largest molar solubility in aqueous solution? (a) CdCO 3 K sp = 5.2 x 10 -12 (b) Cd(OH) 2 K sp = 2.5 x 10 -14 (c) Co(OH) 2 K sp = 2.5 x 10 -15 (d) AgI K sp = 8.3 x 10 -17 (e) ZnCO
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Unformatted text preview: 3 K sp = 1.4 x 10-11 4. [7 points] Which of the following slightly soluble salts would not be more soluble in acidic solution? (a) CdCO 3 K sp = 5.2 x 10-12 (b) Cd(OH) 2 K sp = 2.5 x 10-14 (c) Co(OH) 2 K sp = 2.5 x 10-15 (d) AgI K sp = 8.3 x 10-17 (e) ZnCO 3 K sp = 1.4 x 10-11 5. [7 points] Calculate the molar solubility of Cd(OH) 2 when buffered at a pH = 12.30. The K sp for Cd(OH) 2 is 2.5 x 10-14 . (a) 8.5 x 10-6 M (b) 6.3 x 10-11 M (c) 1.3 x 10-12 M (d) 5.0 x 10-2 M (e) 1.8 x 10-5 M...
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