Question:
PCl5, PCl3 and Cl2 are at equilibrium at 500K in a closed container and their
concentrations are 0.8 × 10–3 mol L–1, 1.2 × 10–3 mol L–1 and 1.2 × 10–3 mol L–1
respectively. The value of Kc for the reaction PCl5 (g) PCl3 (g) + Cl2 (g)
will be
(i) 1.8 × 103
mol L–1
(ii) 1.8 × 10–3
(iii) 1.8 × 10–3 L mol–1
(iv) 0.55 × 104
Solution:
Option (ii) is the answer.