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Anomalous Behavior of Lithium Halogens

LiOH reacts w...

Question

$L i O H$ reacts with $C O_{2}$ to form $L i_{2} C O_{3}$ (atomic mass of $L i = 7)$ . The amount of $C O_{2}$ (in g) consumed by $1 g$ of $L i O H$ is closest to _______.

0.916

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1.832

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0.544

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1.088

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Solution

The correct option is A $0.916$
Balanced chemical equation is:
$2 L i O H + C O_{2} \to {L i}_{2} C O_{3} + H_{2} O$
Molecular weight of each specie is:
$L i O H$ =24 g/mol; $C O_{2}$ =44 g/mol; ${L i}_{2} C O_{3}$ = 74 g/mol; $H_{2} O$ =18 g/mol
From the reaction:
2 mol of $L i O H$ ( $24 \times 2 = 48 g$ ) consumes 1 mol of $C O_{2}$ (44 g)
Therefore, 1 g of $L i O H$ will consume $\frac{1}{48} \times 44 g C O_{2} = 0.916 g C O_{2}$
Option A is the correct answer.

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