Question

Molar solubility of copper hydroxide in pure water, taken into account that water is adding hydroxide into the solution. Ksp=[Cu^2+][OH^-]^2 = 4.8x10^-20

(x) (1.0x10^-7 +2x)^2 = 4.8x10^-20

Answer 1

Cu(OH)2 ---------> Cu⁺² (aq) + 2OH^- (aq)

                       I         0            1*10^-7

                             C        x              2x

                     E         x           1*10^-7 +2x

                     ksp = [Cu⁺²][OH]²

    4.8*10^-20         = x*(1*10^-7 +2x)²

            x   = 1.96*10^-7 M

molar solubility of Cu(OH)2 = 1.96*10^-7 M