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Standard X

Chemistry

Zinc Ion

The ratio of ...

Question

The ratio of the molar amounts of $H_{2} S$ needed to precipitate the metal ions from $20 m L$ each of 1M $C d (N O_{3})_{2}$ and 0.5 M $C u S O_{4}$ is

1 : 1

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2 : 1

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1 : 2

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Indefinite

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Solution

The correct option is B 2 : 1
$C d^{+ 2} + S^{2 -} \to C d S$
$20 \times 1 = 20$
$C u^{+ 2} + S^{2 -} \to C u S$
$20 \times 0.5 = 10$
Ratio $= 2 : 1$

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The ratio of the molar amounts of $H_{2} S$ needed to precipitate the metal ions from $20 m L$ each of 1M $C d (N O_{3})_{2}$ and 0.5 M $C u S O_{4}$ is

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The ratio of the molar amounts of H2S needed to precipitate the metal ions from 20 mL each of 1M Cd(NO3)2 and 0.5 M CuSO4 is

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The ratio of the molar amounts of $H_{2} S$ needed to precipitate the metal ions from $20 m L$ each of 1M $C d (N O_{3})_{2}$ and 0.5 M $C u S O_{4}$ is

The correct option is B 2 : 1
$C d^{+ 2} + S^{2 -} \to C d S$
$20 \times 1 = 20$
$C u^{+ 2} + S^{2 -} \to C u S$
$20 \times 0.5 = 10$
Ratio $= 2 : 1$