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Question

CaCO3+2HClCaCl2+H2O+CO2

The volume of CO2 gas formed when 2.5 g calcium carbonate is dissolved in excess hydrochloric acid at 0oC and 1 atm pressure is:
[1 mole of any gas at 0oC and 1 atm pressure occupies 22.414 L volume].

A
1.12 L
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B
56.0 L
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C
0.28 L
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D
0.56 L
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Solution

The correct option is A 0.56 L
CaCO3+2HClCaCl2+H2O+CO2

100 g 44 g
1 mole 1 mole
22.4 L 22.4 L

We know that 1 mole of any gas at 0oC and 1 atm pressure occupies 22.4 L volume.

So, 100 g CaCO3 forms 22.4 L of CO2

Hence, 2.5 g CaCO3 will form =2.5×22.4100

=56100 L of CO2

=0.56 L of CO2

Hence, the correct option is D

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