The addition of `CaCl_(2)` crystal to `KCl` crystal
a. Lowers the density of the `KCl` crystal
b. Raises the density of the `KCl` crystal
c. Does not affect the density of the `KCl` crystal
d. Increases the Frenkel defects of the `KCl` crystal

Options

A. lowers the density of the KCl crystal
B. raises the density of the KCl crystal
C. does not affect the density of the KCl crystal
D. increases the Frenkel defects of the KCl crystal

Explanation

One `Ca^(2+)` lets two `K^(+)` leave the crystal to maintain the electrical neutrality of the compound
The Mass of two `K^(+)` is greater than the mass of `Ca^(2+)` hence density decreases.