A solution contains 0-01 M Zn2- and 0-01 M Cu2- ions- It is saturated by passing H2S gas in the solution- The S2- ion concentration is 9-2- 10-22 M - The solubility products of ZnS and CuS are 3- 10-22 and 8- 10-36 respectively-Which of the following is true -

The correct option is C CuS will precipitate [CuS] = [Cu^+2[S^ 2] = 0.01×9.2×10^ 22 #160;= 9.2×10^ 24 gt; K_sp [ZnS] = [Zn^+2][S^ 2] = 0.01×10^ 22× ...

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Standard XII

Chemistry

Arrhenius Acid

A solution co...

Question

A solution contains 0.01 M $Z n^{2 +}$ and 0.01 M $C u^{2 +}$ ions. It is saturated by passing $H_{2} S$ gas in the solution. The $S^{2 -}$ ion concentration is $9.2 \times 10^{- 22}$ M . The solubility products of ZnS and CuS are $3 \times 10^{- 22}$ and $8 \times 10^{- 36}$ respectively.Which of the following is true ?

ZnS will precipitate

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Both ZnS and CuS will precipitate

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CuS will precipitate

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Solution

The correct option is C CuS will precipitate
$[C u S] = [C u^{+ 2} [S^{- 2}] = 0.01 \times 9.2 \times 10^{- 22} = 9.2 \times 10^{- 24} > K_{s p}$

$[Z n S] = [Z n^{+ 2}] [S^{- 2}] = 0.01 \times 10^{- 22} \times 9.2 = 9.2 \times 10^{- 24} < K_{s p}$

So only $C u S$ will precipitate in solution.

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Similar questions

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A solution contains 0.01 M Zn2+ and 0.01 M Cu2+ ions. It is saturated by passing H2S gas in the solution. The S2− ion concentration is 9.2×10−22 M . The solubility products of ZnS and CuS are 3×10−22 and 8×10−36 respectively.Which of the following is true ?

The correct option is C CuS will precipitate[CuS]=[Cu+2[S−2]=0.01×9.2×10−22=9.2×10−24>Ksp[ZnS]=[Zn+2][S−2]=0.01×10−22×9.2=9.2×10−24<KspSo only CuS will precipitate in solution.

The correct option is C CuS will precipitate
$[C u S] = [C u^{+ 2} [S^{- 2}] = 0.01 \times 9.2 \times 10^{- 22} = 9.2 \times 10^{- 24} > K_{s p}$

$[Z n S] = [Z n^{+ 2}] [S^{- 2}] = 0.01 \times 10^{- 22} \times 9.2 = 9.2 \times 10^{- 24} < K_{s p}$

So only $C u S$ will precipitate in solution.