Question

The maximum amount of nickel(II) hydroxide that will dissolve in a 0.256 M nickel(II) acetate solution is ..... M.

Answer 1

Ksp of Ni(OH)2 = 5.48×10^–16

concentration of Ni+2 = 0.256 M

Ni(OH)2 (s)   ----------------> Ni+2   +   2 OH-

                                            0.256       2S

Ksp = [Ni+2][OH-]^2

5.48×10^–16 = 0.256 x (2S)^2

[S] = 2.31 x 10^-8 M

maximum amount of nickel(II) hydroxide = 2.31 x 10^-8 M