Question

The ionic compound ${\text{Ca (OH)}}_2$ on dissociation will give a cation. The charge on this cation is _____.

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is B 2

The dissociation reaction of calcium hydroxide is given below:

${\text{Ca(OH)}}_2\text{(aq)}⟶{\text{Ca}}^{2+}+2{\text{OH}}^{-}$.

So, the cation is ${\text{Ca}}^{2+}$ and anion is ${\text{OH}}^{-}$. Therefore, the charge of cation obtained is +2.