Question

Classify bases on the basis of their strength. [3 MARKS]

Answer 1

Each point: 1.5 Mark

(i)Strong alkalis or bases :-

The alkalis or bases which undergo almost complete ionisation in aqueous solution are known as strong alkalis or bases.

Example – NaOH(aq.) → ${Na}^{+}$(aq) + ${OH}^{-}$(aq)

(ii) Weak alkalis or bases :-

The alkalis or bases which undergo only partial ionisation in aqueous solution are known as weak alkalis or Bases.

Example – ${Ca\left(OH\right)}_2$(aq.) → ${Ca}^{2+}$ (aq) + ${2OH}^{-}$ (aq.)