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Dissolution of Solids and Gases in Liquid

4 moles of ...

Question

4 moles of $M g C O_{3}$ is reacted with 6 moles of HCl solution. Find the volume of $C O_{2}$ gas produced at STP.
$M g C O_{3} + 2 H C l \to M g C l_{2} + C O_{2} + H_{2} O$

67.2 lit

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89.6 lit

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76.3 lit

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22.4 lit

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Solution

The correct option is A 67.2 lit
Considering the equation which is already balanced:
$M g C O_{3} + 2 H C l \to M g C l_{2} + C O_{2} + H_{2} O$ ,
Limiting reagent here is $H C l$
Therefore, 6 moles of $H C l$ will produce 3 moles of $C O_{2}$
Volume occupied by 3 moles $= 3 \times 22.4 = 67.2 L$

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