1.

The decomposition of a certain mass of CaCO_(3) gave 11.2dm^(3) of CO_(2) gas at STP. The mass of KOH required to completely neutralize the gas is

Answer»

56 g
28 g
42 g
20 g

Solution :`{:(2KOH,+,CO_(2)rarrK_(2)CO_(3)+H_(2)O),(2(39+16+1),,22.4dm^(3)),(=112g,,"at STP"):}`
22.4 `dm^(3)` of `CO_(2)` at STP required KOH = 112 g
`THEREFORE 11.2dm^(3)` of `CO_(2)` at sTP will required KOH
= 56 g


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