Which of the following is most soluble ?

Options

A. ` Bi_2S_3 (K_(sp) =1xx 10^(-17))`
B. `MnS (K_(sp) = 7xx 10 ^(-16))`
C. ` CuS (K_(sp) = 8 xx 10^(-37))`
D. ` Ag_2S (K_(sp)=6 xx 10^(-51))`

Answer

A

Explanation

For each , calculate S and compare.
`Bi_2S_3 : S = 5 sqrt(( 1xx 10 ^(-17))/( 108) ) , MnS: S =sqrt( 7xx 10 ^(-16))`
` CuS: S =sqrt(8xx 10 ^(-37) ) , Ag_2 S : S =3sqrt( ( 6 xx 1 0 ^(-51))/( 4))`