A sample of a mixture of `CaCl_(2)` and NaCl weighing 4.44 gm was treated to precipatate all the Ca as `CaCo_(3)` , which was then heated and quantitatively converted to 1.24 g of CaO. Choose the correct statements.
(Atomic weight :Ca=40=23, Cl =35.5)

Options

A. Mixture contains `50% NaCI`
B. Mixture contains `60% CaCI_(2)`
C. Mass of `CaCI_(2)` is 2.22g
D. Mass of `CaCI_(2) 1.11g`

Answer

A, C

Explanation

`CaCl_(2) rarr CaCO_(3) rarr CaO (1.12)/(56) = 0.02` mole `CaO`
`:.` Moles of `CaCl_(2) = 0.02` mole
Mass of `CaCl_(2) = 0.02 xx 111 = 2.22g`
`:. %` of `CaCl_(2) = (2.22)/(4.44) xx 100 = 50%`