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Stoichiometric Calculations

The decomposi...

Question

The decomposition of certain mass of $C a C O_{3}$ gave 11.2 $d m^{3}$ of $C O_{2}$ gas at STP. The mass of KOH required to completely neutralise the gas is :

56 g

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28 g

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42 g

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20 g

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Solution

The correct option is B 56 g
$\begin{matrix} C a C O_{3} \to C a O + C O_{2} (1 / 2 m o l e) 2 K O H + C O_{2} \to K_{2} C O_{3} + H_{2} O 2 \to 1 1 m o l e o f C O_{2} r e a c t w i t h 2 m o l e o f K O H 1 / 2 m o l e o f C O_{2} r e a c t w i t h 1 m o l e o f K O H s o, m a s s o f K O H r e q u i r e d = 56 g m \end{matrix}$
hence, option $A$ is correct.

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Similar questions

C a C O_{3}

d m^{3}

C O_{2}

C a C O_{3}

11.2

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:

C a C O_{3} = 100

H C l = 36.5

C O_{2} = 44.0

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200

H C l

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C O_{2}

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80% purity of 200 g caco3 decomposes to produce the CO2,FIND the volume of co2 gas at Stp(approximately)

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