Question

The amount of quick lime that can be produced by heating 100gof 90%pure le stone. What is the answer?

Answer 1

Explanation:

Heating of limestone shown by:

CaCo3-->CaO+Co2

From the balancing chemical equation:

100 g of CaCo3 decomposes to give 56 g of CaO

Thus when purityis 100%,the mass of CaO obtained by heating 100 g of lime stone is=

56 g

When purity is 90% the mass of CaCo3 is 90/100×100=90 g

100 g of CaCo3 gives=56 g of CaO

90 g of CaCo3 gives=56/100×90=50.4 of Cao