Calculate the weight of sodium bicarbonate to be dissociated to give $0.56$ $L$ of $C O$ $_{2}$ gas.

4.2 g

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2.1 g

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1.05 g

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3.15 g

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Solution

The correct option is B 4.2 g
The thermal decomposition reaction of $N a H C O_{3}$ can be written as:
$2 N a H C O_{3} \to C O_{2} + H_{2} O + N a_{2} C O_{3}$
Now, $22.4$ L of $C O_{2}$ is produced from $2 \times 84$ $= 168$ g of $N a H C O_{3}$ .
$0.56$ L of $C O_{2}$ is produced from $\frac{168}{22.4} \times 0.56$ $= 4.2$ g.

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Calculate the weight of sodium bicarbonate to be dissociated to give 0.56 L of CO2 gas.

The correct option is B 4.2 gThe thermal decomposition reaction of NaHCO3 can be written as:2NaHCO3→CO2+H2O+Na2CO3Now, 22.4 L of CO2 is produced from 2×84 =168 g of NaHCO3.0.56 L of CO2 is produced from 16822.4×0.56 =4.2 g.

Calculate the weight of sodium bicarbonate to be dissociated to give $0.56$ $L$ of $C O$ $_{2}$ gas.