Question

The solubility product constant `(K_(sp))` of salts of types `MX, MX_(2)`, and `M_(3)X` at temperature `T` are `4.0 xx 10^(-8), 3.2 xx 10^(-14)`, and `2.7 xx 10^(-15)`, respectively. The solubilities of the salts at temperature `T` are in the order
A. `MX gt MX_(2) gt M_(3)X`
B. `M_(3)X gt MX_(2) gt MX`
C. `MX_(2) gt M_(3)X gt MX`
D. `MX gt M_(3)X gt MX_(2)`

Answer 1

Correct Answer - D
Solubilities cannot be directly calculated because ail these salts have different formula.
`{:("Salt","Solubility product","Solubility"),(MX,S^(2)=4.0 xx10^(-8),S=2 xx10^(-4)),(MX,4S^(3)=3.2 xx10^(-14),S=2 xx10^(-5)),(M_(3)X,27 S^(4)=2.7 xx10^(-15),S=1 xx10^(-4)):}`
Order of solubility `= MX gt M_(2)X gt MX_(2)`