Chemistry - Complete P-block Question with Solution | TestHub

${\mathrm{PCl}}_5$ is a yellowish white powder and in moist air, it hydrolyses into ${\mathrm{POCl}}_3$ and finally gets converted to phosphoric acid.

${\mathrm{PCl}}_5+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{POCl}}_3+2\mathrm{HCl}$

${\mathrm{POCl}}_3+3{\mathrm{H}}_2\mathrm{O}\to {\mathrm{H}}_3{\mathrm{PO}}_4+3\mathrm{HCl}$

Phosphoric acid has 3 ionisable hydrogen atoms.