Question

At `298 K` the Ksp of `M_(2)SO_(4)` is `3.2 10^(-5)`. The max. concentration of `SO_(4)^(-2)` ions that colud be attain in saturated solution of this solid at `298 K` is ?
A. `2 xx 10^(-3) M`
B. `7 xx 10^(-4) M`
C. `3 xx 10^(-5) M`
D. `2 xx 10^(-2) M`

Answer 1

Correct Answer - D
`K_(SP) = [M^(+)]^(2)[SO_(4)^(-2)] = [2S]^(2)[S]`
`3.2 xx 10^(-3) = 4S^(3)`
`S^(3) = (3.2 xx10^(-5))/(4) = 8 xx 10^(-6) = 2 xx 10^(-2) M`