Question

If cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion?

Answer 1

The concentration of $Cl^{-}$ ions will be double than that of $Ca^{2+}$

Calcium chloride - $CaCl_{2}$ has one Ca atom and 2 atom of chlorine.

When it is dissolved in water, it disassociates into $Ca^{2+}$ and $2Cl^{-}$

Thus, the concentration of $Cl^{-}$ ions will be double than that of $Ca^{2+}$

Or we can say the ratio of $Cl^{-}$ : $Ca^{2+}$ = 2:1