If a reaction mixture initially contains a co concentration of 0.1470 and a cl2 concentration of 0.175 at 1000k. what is the equilibrium concentration of co at 1000 k?

When we have this equation:

CO (g) + Cl2 (g) ↔ COCl2 (g)

intial 0.147 0.175 0

change - X - X + X

final (0.147-X) (0.175-X) X

so from the ICE table, we substitute in Kc formula : (when we have Kc = 255)

Kc = [COCl2]/[CO][Cl2]

255 = X / (0.147-X) (0.175-X)

255 = X / (X^2 - 0.322 X + 0.025725)

X = 0.13

∴[CO] = 0.147 - X = 0.147 - 0.13

= 0.017 m