Chemistry - Chemical Equilibrium Question with Solution | TestHub

$\underset{\underset{1-0.8}{\underset{}{1}}}{\mathrm{P}\mathrm{C}{\mathrm{l}}_5}\rightleftharpoons \underset{\underset{0.8}{\underset{}{0}}}{\mathrm{P}\mathrm{C}{\mathrm{l}}_5}+\underset{\underset{0.8}{\underset{}{0}}}{\mathrm{C}{\mathrm{l}}_2}$
Total number of moles at equilibrium$=0.2+0.8+0.8=1.8$
${\mathrm{K}}_{\mathrm{P}}=\frac{\left({\mathrm{P}}_{\mathrm{P}\mathrm{C}{\mathrm{l}}_3}\right)\left({\mathrm{P}}_{\mathrm{C}{\mathrm{l}}_2}\right)}{\left({\mathrm{P}}_{\mathrm{P}\mathrm{C}{\mathrm{l}}_5}\right)}$$=\frac{\left(\frac{0.8}{1.8}\text{p}\right)\times \left(\frac{0.8}{1.8}\text{p}\right)}{\left(\frac{0.2}{1.8}\text{p}\right)}=2.22\text{p}$