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 0.1510 M and a Cl2 concentration of 0.179 M at 1000 K. You may want to reference ( pages 667 - 677) section 14.8 while completing this problem. Part A What is the equilibrium concentration of CO at 1000 K? Express your answer in molarity to three significant figures. [CO] = M SubmitMy AnswersGive Up Part B What is the equilibrium concentration of Cl2 at 1000 K? Express your answer in molarity to three significant figures. [Cl2] = M SubmitMy AnswersGive Up Part C What is the equilibrium concentration of COCl2 at 1000 K? Express your answer in molarity to three significant figures. [COCl2] =

Answer 1

CO (g)    +   Cl2   (g)   <--------------> COCl2 (g)

0.1510         0.179                                   0

0.1510 - x      0.179 - x                             x

Kc = x / (0.1510 - x)(0.179 - x)

255 = x / x^2 - 0.33 x + 0.027

255 x^2 - 84.15 x + 6.885 = x

x = 0.1374

equilibrium concentrations :

[CO] = 0.0136 M

[Cl2] = 0.0416 M

[CoCl] = 0.137 M