28 g KOH is required to completely neutr...

28 g KOH is required to completely neutralise `CO_2` produced on heating 60 g of impure `CaCO_3` The percentage purity of `CaCO_3` is approximately (molar masses of KOH and `CaCO_3` are 56 and `100 g "mol"^(-1)` , respectively)

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