Find the Molarity of Hydrochloric acid containing `31.5%` of hydrochloric acid. Its specific gravity is 1.16.

Explanation

Mass of `1000 cm^(3)` of the acid `=1000 xx 1.16 = 1160`g
Mass of hydrochloric acid in 100g of the solution = 3.15 g
Mass of hydrochloric acid 1160 g of the solution `=(3.15 xx 1160)/100`
`therefore 1000 cm^(3)` of the acid solution contain `=(31.5 xx 1160)/100` g of the acid.
`therefore` normality of the acid solution `=("mass per" dm^(3))/("eq. mass") = (31.5 xx 1160)/(100 xx 36.5) = 10.01`