# Why is MgO a Lewis base?

Mar 4, 2016

${O}^{2 -}$ in $M g O$ acts as donor of lone pair of electron to ${H}^{+}$

#### Explanation:

When water is added ${O}^{-} 2$ion in it forms $O {H}^{-}$ by donating lone pair of electron to ${H}^{+}$ formed by ionisation of ${H}_{2} O$

Thus
${H}_{2} O r i g h t \le f t h a r p \infty n s {H}^{+} + O {H}^{-}$

${O}^{-} 2 + {H}^{+} = O {H}^{-}$