Common salt obtained from Clifton beach contained 67.75% chlorine while `6.40 g` of a sample of common salt from Khewra mine contained `3.888 g` of chlorine. Show that these data are in accordance with the law of constant composition.

Answer

A

Explanation

First case
Common salf from Clifton beach contains `= 67.75 % Cl_(2)`
`100 g` of salf `= 60.75 g of Cl_(2)`
`1 g` of salt `= (60.75)/(100) = 0.6075 g of Cl_(2)`
Second case
`6.40 g` of `NaCl` from Khewra mine `= 3.888 g of Cl_(2)`
`1 g` of NaCl from Khewra mine `= (3.888)/(6.40) g of Cl_(2)`
Thus, the weight of `Cl_(2)` in `1 g` of salt in both the cases is same. Hence, the law of constant compositon is verified.