Question

For the following reaction, Kc = 255 at 1000 K. CO(g)+Cl2(g)⇌COCl2(g) A reaction mixture initially contains a CO concentration of 0.1550 M and a Cl2 concentration of 0.171 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

                         

Initial                  0.1550M     0.171M              0

Final                  (0.1550-x)   (0.171-x)            x

solving the quadratic equation

x = 0.1383 and one value will be rejected since it is greater than 0.1550 otherwise the CO concentration will be negative

Equilibrium concentration of CO = 0.1550 - 0.1383 = 0.0167

Equilibrium concentration of Cl2 = 0.171 - 0.1383 = 0.0327

Equilibrium concentration of CoCl2 = x = 0.1383