Question

Arrange the given compounds in the increasing order of degree of ionisation.

• A. $NaOH$
• B. $N{H}_{4}OH$
• C. $Ca(OH{)}_2$
• D.
  $Al(OH{)}_3$

Answer 1

$N{H}_{4}OH<Al(OH{)}_3<Ca(OH{)}_2<NaOH$

The degree of ionisation is explained on the basis of the ability of the compounds to dissociate into their ions. In basic hydroxides, these ions are $M^{x+}$ and $x\left(O{H}^{-}\right)$. We know that the strength of basicity is defined as the ability to liberate $O{H}^{-}$ ions.

$N{H}_{4}OH$ is a weak base followed by $Al(OH{)}_3$ which is an amphoteric oxide (which has both acidic and basic nature). $Ca(OH{)}_2$, an alkaline earth metal hydroxide which is less basic than NaOH (alkali metal hydroxide)