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Stoichiometric Calculations

What mass of ...

Question

What mass of $H N O_{3}$ is needed to convert $5 g$ of iodine into iodic acid according to the reaction?
$I_{2} + H N O_{3} ⟶ H I O_{3} + N O_{2} + H_{2} O$

12.4 g

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24.8 g

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0.248 g

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49.6 g

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Solution

The correct option is B $12.4 g$
$I_{2} + H N O_{3} ⟶ H I O_{3} + N O_{2} + H_{2} O$
0 +5 +5 +4
At equivalent point,
$N_{1} V_{1} = N_{2} V_{2}$
$5 * 10 / 254 = m / 63; m = 12.4$ gm.

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What mass of $H N O_{3}$ is needed to convert 5 g of iodine into iodic acid according to the reaction? (at mass of I = 127 u)

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