Question

In: Chemistry

At a temperature other than 25oC, Cd(OH)2 solubility is 5.5 x 10-4 . Calculate it's Ksp...

At a temperature other than 25oC, Cd(OH)2 solubility is 5.5 x 10-4 . Calculate it's Ksp at this temperature.

[ACCORDING TO MY TEXT, Ksp of Cd(OH)2 = 2.5 x 1014 @ 25 C]

A.1.7 x 10-10

B.6.7 x 10-10

C.2.5 x 10-14

Solutions

Expert Solution

At a temperature other than 25oC, Cd(OH)2 solubility is 5.5 x 10-4 . Calculate it's Ksp at this temperature.

A.1.7 x 10-10

B.6.7 x 10-10----------------answer

C.2.5 x 10-14

Write Equation:                                Cd(OH)2(s) ----------àCd2+(aq) + 2 OH-(aq)

Initial Conc.          -                   0                          0

                                    Change                 -                 +5.5X 10-4        +2(5.5X 10-4)

                                    Equilibrium            -                   5.5 X 10-4          11 X 10-4

Ksp = [cd ][OH-]2

Ksp = [5.5 X 10-4][11 X 10-4]2

Ksp = 0.00055 X 0.00000121 =6.655e-10


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