Solubility product of the hydroxide `M(OH)_2 " is " 4 xx 10 ^(-12) ` , Select the correct statement (s) among the following:

Options

A. The pH of its saturated solution will be 10. 3
B. Its solubility will decrease in a buffer medium of pH= 9
C. Its solubility will increase in a buffer medium of pH =1
D. Its solubility unaffected by pH of the medium

Answer

A, C

Explanation

` 4S ^(3) =4 xx 10^(-12) , S = 10 ^(4) M,`
` [OH^(-) ] =2 xx 10^(-12) , S = 10 ^(-4) M,`
In pH `= 9, POH =10 ^(-5) `
` i.e., [OH^(-) ] downarrow rArr " solubility will " uparrow `
In pH =1, POH =` 10 ^(-13)`
` i.e., [OH^(-)] downarrow rArr " Solubility will " uparrow `