Question

For the following reaction, Kc = 255 at 1000 K.
CO (g) + Cl2 (g) ⇌ COCl2 (g)
A reaction mixture initially contains a COconcentration of 0.1470 M and a Cl2concentration of 0.179 M at 1000 K.

Part a. What is the equilibrium concentration of CO at 1000 K?

Part B:What is the equilibrium concentration of Cl2 at 1000 K?

Part C:What is the equilibrium concentration of COCl2 at 1000 K?

Answer 1

                 CO (g) + Cl2 (g) ⇌ COCl2 (g)

I                 0.147     0.179        0

C                 -x        -x               +x

E               0.147-x 0.179-x      +x

      Kc = [COCl2]/[CO][Cl2]

    255   =    x/(0.147-x)(0.179-x)

255*(0.147-x)(0.179-x) =x

x = 0.13

[COCl2] = x= 0.13M

{CO] = 0.147-x = 0.147-0.13 = 0.017M

[Cl2] = 0.179-x = 0.179-0.13   = 0.049M