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 B CuS will precipitateFrom given values, [CuS] = [Cu^+2[S^ 2] = 0.01×9.2×10^ 22 #160;= 9.2×10^ 24 gt; K_sp and [ZnS] = [Zn^+2] ...

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Standard X

Chemistry

Zinc Ion

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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CuS will precipitate

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Both ZnS and CuS will precipitate

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Both

Z n^{2 +}

and

C u^{2 +}

will remain in the solution.

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can not predicated

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Solution

The correct option is B CuS will precipitate
From given values,
$[C u S] = [C u^{+ 2} [S^{- 2}] = 0.01 \times 9.2 \times 10^{- 22} = 9.2 \times 10^{- 24} > K_{s p}$
and
$[Z n S] = [Z n^{+ 2}] [S^{- 2}] = 0.01 \times 10^{- 22} \times 9.2 = 9.2 \times 10^{- 24} < K_{s p}$

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

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Similar questions

Q. 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 -}

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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 ?

Q. A solution containing

0.1 M

{Z n}^{2 +}

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8.1 \times 10^{- 31} M

. Will

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C u S

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K_{s p} (Z n S) = 3.0 \times 10^{- 23}

and

K_{s p} (C u S) = 8.0 \times 10^{- 4}

Q. A solution, containing

0.01 M Z n^{+ 2}

and

0.01 M C u^{2 +}

is saturated by passing

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8.1 \times 10^{- 21} M, K s p

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and

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3.0 \times 10^{- 22}

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8.0 \times 10^{- 30}

respectively. Which of the following will occur in the solution?

Q. Different solutions containing

M n S, F e S, Z n S a n d H g S

have the following concentrations :

0.01 M

concentration of each

M n^{2 +}, F e^{2 +}, Z n^{2 +}

and

H g^{2 +}

[S^{2 -}] = 10^{- 8} M

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Given

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M n S, F e S, Z n S a n d H g S

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Q. A saturated solution of

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contains

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. The solubility product of some sulphides are

C u S = 10^{- 44}

F e S = 10^{- 14}

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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 B CuS will precipitateFrom given values,[CuS]=[Cu+2[S−2]=0.01×9.2×10−22=9.2×10−24>Kspand[ZnS]=[Zn+2][S−2]=0.01×10−22×9.2=9.2×10−24<KspSo only CuS will precipitate in solution.