Phosphorus penta-chloride, PCl5, decomposes when heated as described by the following equation.
PCl5(g)˜PCl 3(g) + Cl2(g)
Determine the equilibrium concentrations of PCl5, PCl3 and Cl2? The equilibrium constant Kc=0.0211 if the initial concentration of PCl5 is 0.750mol/L.