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Stoichiometric Calculations

What volume o...

Question

What volume of $0.40 M H_{2} S O_{4}$ is required to produce $34.0 g$ of $H_{2} S$ ? $8 K I + 5 H_{2} S O_{4} \to 4 K_{2} S O_{4} + 4 I_{2} + H_{2} S + 4 H_{2} O$

25.0 L

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16.8 L

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12.5 L

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10.0 L

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Solution

The correct option is C $12.5 L$
1 mole of $H_{2} S \equiv 5$ moles of $H_{2} S O_{4}$
34 g of $H_{2} S \equiv 5$ moles of $H_{2} S O_{4}$
$0.40 \times V_{H_{2} S O_{4}} = 5$
$∴ V_{H_{2} S O_{4}} = \frac{5}{0.40} = 12.5 L$

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