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Concentration Terms

The number of...

Question

The number of moles of $C O_{2}$ produced, when $3$ moles of $H C l$ react with excess of $C a C O_{3}$ , is:

1

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1.5

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2

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2.5

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Solution

The correct option is B $1.5$
The reaction is $C a C O_{3} + 2 H C l \to C a C l_{2} + H_{2} O + C O_{2}$ .

Thus, $2$ moles of $H C l$ reacts with one mole of calcium carbonate to produce one mole each of calcium chloride, water and carbon dioxide respectively.

Hence, $3$ moles of $H C l$ will react with excess of calcium carbonate to produce $3 \times \frac{1}{2} = 1.5$ mol of carbon dioxide.

Hence, option B is correct.

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