for the following reaction Kc = 255 at 1000 k CO + Cl2 ---> COCl Exercise 14.54

Question

for the following reaction Kc = 255 at 1000 k CO + Cl2 ---> COCl Exercise 14.54 with feedback For the following reaction, Kc255 at 1000 K. CO (g) + Cl2 (g) COC12 (g) A reaction mixture initially contains a CO concentration of 0.1450 M and a Cl2 concentration of 0.180 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. Co0.172 M Submit Give Up

Explanation / Answer

Solution :-

CO + Cl2 ---> COCl2

Kc= 255

mixture initially contains a CO concentration of 0.1450 M and a Cl2 concentration of 0.180

Lets make the ICE table for the reaction

   CO       +      Cl2    --->     COCl2

0.1450         0.180               0

-x                   -x                      +x

0.1450-x     0.180-x             x

Now lets write the Kc equation

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

255 = [x] /[0.1450-x][0.180-x]

255 * [0.1450-x][0.180-x] = x

X= 0.1337

Now lets calculate the equilibrium concentration of the each species

[CO] eq = 0.1450-x= 0.1450 M - 0.1337 M =0.0113 M

[Cl2]eq = 0.180 M –x = 0.180 M – 0.1337 M = 0.0463 M

[COCl2]eq = x =0.1337 M

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