Solution: Phosphorus pentachloride decomposes according to the chemical equation. PCl5(g) ⇌ PCI3(g) + Cl2(g)             Kc = 1.80 at 250 °C A 0.250 mol sample of PCl5(g) is injected into an empty 2.50 L reac

Phosphorus pentachloride decomposes according to the chemical equation.

PCl₅(g) ⇌ PCI₃(g) + Cl₂(g)             K_c = 1.80 at 250 °C

A 0.250 mol sample of PCl₅(g) is injected into an empty 2.50 L reaction vessel held at 250 °C. Calculate the concentrations of PCl₅(g) and PCl₃(g) at equilibrium.