midterm1_sp08

midterm1_sp08 - 1. [7 points] The solubility product...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
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 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
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
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 6. [7 points] A solution contains 0.015 M AsO 4 3– , 0.010 M I , and 0.005 M CO 3 2– . If AgNO 3 is slowly added, in what order would the silver salts precipitate? A g 3 AsO 4 , K sp = 1.0 x 10 –22 A g I , K sp = 8.3 x 10 –17 Ag 2 CO 3 K sp = 8.1 x 10 –12 (a) 1 st : Ag 2 CO 3 2 nd : Ag 3 AsO 4 3 rd : AgI (b) 1 st : Ag 3 AsO 4 2 nd : Ag 2 CO 3 3 rd : AgI (c) 1 st : AgI 2 nd : Ag 3 AsO 4 3 rd : Ag 2 CO 3 (d) 1 st : AgI 2 nd : Ag 2 CO 3 3 rd : Ag 3 AsO 4 (e) 1 st : Ag 2 CO 3 2 nd : AgI 3 rd : Ag 3 AsO 4 7. [7 points] What is the concentration of free cobalt ion if 5.25 x 10 –4 moles of Co(NO 3 ) 2 is added to 1.00 L of 3.0 M NH 3 solution? The K f for the formation of Co(NH 3 ) 6 2+ is 8.3 x 10 4 . (a) 2.1 x 10 –9 M (b) 3.2 x 10 –4 M (c) 5.3 x 10 –4 M (d) 8.7 x 10 –12 M (e) 1.2 x 10 –5 M 8. [7 points] The solubility of which of the following salts will be least sensitive to pH? (a) KClO 4 (b) BaF 2 (c) FePO 4 (d) NiCO 3 (e) The solubility of all four salts will be dramatically affected by pH.
Background image of page 2
9. [7 points] How many of the following reagents would increase the solubility of Ni(OH) 2 (s)? Ni(NO
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

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.

Page1 / 9

midterm1_sp08 - 1. [7 points] The solubility product...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online