A solution contining 0.01 M Zn^(2+) and ...

A solution contining 0.01 M `Zn^(2+)` and 0.01 M `Cu^(2+)` is saturated by passing `H_(2)S` gas. The `S^(-2)` concentration is `8.1 xx 10^(-21)` M, `K_(sp)` for ZnS and CuS are `3.0 xx 10^(-22)` and `8.0 xx 10^(-36)` respectively. Which of the following will occur in the solution?

Only ZnS precipitates

Both CuS and ZnS precipitates

Only CuS precipitates

No precipitation occurs

Text Solution

Verified by Experts

The correct Answer is:

For precipitation
`IP gt K_(sp)`
`[Zn^(2+)][S^(2-)] gt K_(sp)`
`[Cu^(2+)][S^(2-)] gt K_(sp)`

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