Question

# By drawing an electron dot diagram, show the lone pair effect leading to the formation of ammonium ion from ammonia gas and hydrogen ion.

Open in App
Solution

## The lone pair on nitrogen atom in ammonia attracts hydrogen ion, leading to the formation of a coordinate bond between nitrogen and hydrogen. It is represented by an arrow ($\to$) pointing from nitrogen (donor) to hydrogen (acceptor) in the electron dot diagram as shown below. Formation of ammonium ion can be represented as: $\mathrm{H}:\underset{..}{\overset{\underset{..}{H}}{\mathrm{N}}}:\mathrm{H}+{\mathrm{H}}^{+}\to {\left[\mathrm{H}:\underset{\stackrel{..}{\mathrm{H}}}{\overset{\underset{..}{\mathrm{H}}}{\mathrm{N}}}:\mathrm{H}\right]}^{+}\mathrm{or}{\left[\mathrm{H}-\underset{\stackrel{\overline{)}}{\mathrm{H}}}{\overset{\underset{\overline{)}}{\mathrm{H}}}{\mathrm{N}}}\to \mathrm{H}\right]}^{+}$

Suggest Corrections
3