Name (print)
Quiz 3 (100 points)
July 22, 2016
Chemistry 1304
1. (20 points) If the Ksp of calcium hydroxide, Ca(OH)2, is 8.0 x 10-6, will a precipitate form when 10.0 mL
of 0.0010 M Ca(NO3)2 is added to 50.0 mL of 0.0020 M KOH? WRITE all pertinent CHEMICAL
REACTIONS and SHOW ALL WORK.
2. (20 points) The solubility product for CrF3 is Ksp = 6.6 x 10-11. What is the molar solubility of CrF3?
WRITE all pertinent CHEMICAL REACTIONS and SHOW ALL WORK.
3. (20 points) What is the molar solubility of silver iodide, AgI, in 0.20 M NH3, given that Ksp for AgI is 8.3
x 10-17 and Kf for Ag(NH3)2+ is 1.5 x 107. WRITE all pertinent CHEMICAL REACTIONS and
SHOW ALL WORK.
On my honor, I have neither given nor received unauthorized aid on this exam.
Signed
1.
Date
A 40.0 mL sample of a 0.40 M HNO2 solution was titrated with 0.80 M KOH.
Given that HNO2 is a weak acid whose Ka = 4.5 x 10-4, calculate the pH after the following
volumes of KOH have been added:
(40 points)
(a) 10.0 mL
(b) 30.0 mL
Name (print)
Quiz 3 (100 points)
July 22, 2016
Chemistry 1304
4. (20 points) If the Ksp of calcium hydroxide, Ca(OH)2, is 8.0 x 10-6, will a precipitate form when 10.0 mL
of 0.0010 M Ca(NO3)2 is added to 50.0 mL of 0.0020 M KOH? WRITE all pertinent CHEMICAL
REACTIONS and SHOW ALL WORK.
5. (20 points) The solubility product for CrF3 is Ksp = 6.6 x 10-11. What is the molar solubility of CrF3?
WRITE all pertinent CHEMICAL REACTIONS and SHOW ALL WORK.
6. (20 points) What is the molar solubility of silver iodide, AgI, in 0.20 M NH3, given that Ksp for AgI is 8.3
x 10-17 and Kf for Ag(NH3)2+ is 1.5 x 107. WRITE all pertinent CHEMICAL REACTIONS and
SHOW ALL WORK.
On my honor, I have neither given nor received unauthorized aid on this exam.
Signed
2.
Date
A 40.0 mL sample of a 0.40 M HNO2 solution was titrated with 0.80 M KOH.
Given that HNO2 is a weak acid whose Ka = 4.5 x 10-4, calculate the pH after the following
volumes of KOH have been added:
(40 points)
(a) 10.0 mL
(b) 30.0 mL