At 298 K , the `K_(sp)` of `M_(2) SO_(4)` is `3.2 xx 10^(-5)` . The maximum concentration of `SO_(4)^(2-)` ion that could be attained in a saturated solution of this solid at 298 K is

Options

A. ` 4 xx 10^(-7) M`
B. ` 2xx10^(-7) M`
C. ` 0.001 M`
D. ` 0.01 M`

Answer

B

Explanation

` IP gt KsP `
` (10 ^(_4) ) [SO_4^(2-) ] gt 4 xx1 0^(-11) rArr [SO_4^(2-) ] gt 4 xx 10 ^(-7) `
moles ` = 4xx 10 ^(-7) xx 0.5 = 2 xx 10 ^(_7) `