The Decomposition Of A Certain Mass CaCO3 gave 11.2 Dm3 of CO2 gas At STP. The Mass Of KOH Required To Completely Neutralize The Gas Is 

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The decomposition of a certain mass CaCO3 gave 11.2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralize the gas is 


Correct option is

56 g


2 KOH       +     CO2    →  K2CO3  +   H2O

2(39+16+1)        22.4 L

     = 112 g         at STP

22.4 dm3 of CO2 at STP require KOH = 112g

11.2 dm3 of CO2 at STP will require KOH

                          = 56 g



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