Question

Solve this.
10 g of a mixture of Bao and Cao requires 100 cm3 of 2.5 M HCl to react completely. The percentage of calcium oxide in the mixture is approximately (Given : molar mass of Bao = 153)

Answer 1

Consider the mass % of CaO is 55,1%,

Then mass os CaO = 5.51

and mass of BaO = 4.49

So,

Number of gram equivalent of CaO = 5.51/28

Number of gram equivalent of BaO = 4.49/76.5

So

The sum of gram equivalents should be equal to 100 X 2.5

-------------

1000

= 0.25