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.