1- A student measures the molar solubility of silver carbonate in a water soluti
ID: 919046 • Letter: 1
Question
1- A student measures the molar solubility of silver carbonate in a water solution to be 1.30×10-4 M. Based on her data, the solubility product constant for this compound is : _____________
2- A student measures the molar solubility of copper(II) hydroxide in a water solution to be 3.49×10-7 M. Based on her data, the solubility product constant for this compound is : ______________
3- A student measures the Co2+ concentration in a saturated aqueous solution of cobalt(II) hydroxide to be 3.88×10-6 M. Based on her data, the solubility product constant for cobalt(II) hydroxide is : ___________
Explanation / Answer
1)
Ag2CO3 -----------------> 2 Ag+ + CO32-
2S S
S = 1.30×10-4 M.
Ksp = [Ag+]^2[CO32-]
= (2S)^2 x S
= 4 S^3
= 4 x (1.30×10-4 )^3
Ksp = 8.79 x 10^-12
2)
S = 3.49×10-7 M
Cu (OH)2 -----------------> Cu+2 + 2 OH-
Ksp = 4S^3
= 4 x (3.49×10-7)^3
Ksp = 1.7 x 10^-19
3)
S = 3.88×10-6 M
Co(OH)2 ----------------> Co+2 + 2 OH-
Ksp = 4 S^3
= 4 x (3.88×10-6)^3
Ksp = 2.34 x 10^-16
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