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The K(sp) of FeS = 4 xx 10^(-19) at 298 ...

The `K_(sp)` of `FeS = 4 xx 10^(-19)` at 298 K. The minimum concentration of `H^(+)` ions required to prevent the precipitation of FeS from a 0.01 M solution `Fe^(2+)` salt by passing `H_(2)S(0.1M)` (Given `H_(2)S k_(a_1) xx k_(b_1) = 10^(-21)`)

A

`1.6 xx 10^(-3)` M

B

`2.5 xx 10^(-4)` M

C

`2.0 xx 10^(-2)` M

D

`1.2 xx 10^(-4)` M

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The correct Answer is:
A
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