The solubility product of a springly soluble metal hydroxide `[M(OH)_2] is 5xx10^(-16) mol ^(3) L^(-3) ` at 298 K.Find the pH of its saturated aqucous solutions.

Answer

9

Explanation

` M(OH)_2 hArr underset(S) M^(+2) +2 underset(S) OH^(-) `
` 4S^(3) = 5 xx 10^(-16) rArrS = 5 xx 10 ^(-6)`
` [OH^(-) ] =2S =10 ^(-5) , POH =5, pH = 9`