Which of the following species is more soluble in water ?

Options

A. `M(OH)_(3) (K_(SP)=1xx10^(-35))`
B. `M(OH)_(2) (K_(SP)=1xx10^(-30))`
C. `MOH (K_(SP)=1xx10^(-28))`
D. `MOH (K_(SP)=1xx10^(-26))`

Answer

A

Explanation

Solubility of `M(OH)_(3)=4sqrt((K_(SP))/(27))=4sqrt((10^(-35))/(27))=7.8xx10^(-10)`
Solubility of `M(OH)_(2)=3sqrt((K_(SP))/(4))=6.3xx10^(-11)`
Solubility of `MOH=sqrt(K_(SP))=10^(-14)`