The molar solubility of Cd(OH)2 is 1.84 × 10−5 M in water. The expected solubility of Cd(OH)2 in a buffer solution of pH = 12 is:
a)
1.84 × 10−9 M
b)
6.23 × 10−11 M
c)
10−9 M
d)
2.49
10−10 M
a)
1.84 × 10−9 M
b)
6.23 × 10−11 M
c)
10−9 M
d)
2.4910−10 M
Question ID - 56452 | SaraNextGen Top Answer The molar solubility of Cd(OH)2 is 1.84 × 10−5 M in water. The expected solubility of Cd(OH)2 in a buffer solution of pH = 12 is:
a)
1.84 × 10−9 M
b)
6.23 × 10−11 M
c)
10−9 M
d)
2.4910−10 M
The molar solubility of Cd(OH)2 is 1.84 × 10−5 M in water. The expected solubility of Cd(OH)2 in a buffer solution of pH = 12 is:
|
a) |
1.84 × 10−9 M |
b) |
6.23 × 10−11 M |
|
c) |
|
d) |
2.49 |
1 Answer
127 votes
Answer Key / Explanation : (d) -
Cd(OH)2 
At equilibrium, Ksp = S(2S)2
= 4S3
⇒ Ksp = 4 × (1.84 × 10−5)3
Solubility in buffer solution having pH = 12
[OH−] = 10−2
Cd(OH)2 
Ksp = 4
(1.84 
10−5)3 = 
(10−2)2
⇒ 
= 
= 2.49
10−10 M
127 votes
Answer Link
127