# How many atoms of each element are in 3CaCl_2?

Aug 25, 2017

Each individual formula unit of $C a C {l}_{2}$ contains $1 \times C {a}^{2 +}$, and $2 \times C {l}^{-}$.

#### Explanation:

The ionic salt formed is of course electrically neutral; and electrical neutrality requires this PRECISE number of anions and cations. So if we got 3 formula units or even 3 moles, we gots $3 \times C {a}^{2 +} + 6 \times C {l}^{-}$.....