A certain weight of pure $C a C O_{3}$ is made to react completely with $200$ mL of a $H C l$ solution to give $224$ mL of $C O_{2}$ gas at STP. The normality of the $H C l$ is:

0.05 N

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0.1 N

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1.0 N

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0.2 N

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Solution

The correct option is B $0.1 N$
The balanced reaction is as follows:

$C a C O_{3} + 2 H C l ⟶ C O_{2} + C a C l_{2}$

$224$ mL of $C O_{2}$ is $0.01$ moles at STP.

Hence, number of moles of $C a C O_{3}$ is $0.01$ .

Hence, $0.02$ moles of $H C l$ is needed for complete reaction.

Volume of $H C l$ solution used is $200$ mL.

For a monobasic acid, molarity $=$ normality

Hence, $N o r m a l i t y = \frac{m o l e s}{v o l u m e} = \frac{0.02}{0.2} N$

$N o r m a l i t y = 0.1 N$

Hence, the correct option is $B$

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A certain weight of pure CaC $O_{3}$ is made to react completely with 200 mL of an HCl solution to give 224 mL of C $O_{2}$ gas at STP. The normality of the HCl is

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A certain weight of pure CaCO3 is made to react completely with 200 mL of a HCl solution to give 224 mL of CO2 gas at STP. The normality of the HCl is:

A certain weight of pure $C a C O_{3}$ is made to react completely with $200$ mL of a $H C l$ solution to give $224$ mL of $C O_{2}$ gas at STP. The normality of the $H C l$ is: