COUNTS T Predict and calculate the effect of concentration changes on an equilib

Question

COUNTS T Predict and calculate the effect of concentration changes on an equilibrium system. Close Problem Some COC12 is allowed to dissociate into CO and C12 at 873 K. At equilibrium, [C0012] = 0.225 M, and [CO] [Cl2] = 0.125 M. Additional COC12 is added so that [COC12]ne,-0.414 M and the system is allowed to once again reach equilibrium. COC12(g) CO(g) + Cl2(g) K = 6.98×10-2 at 873 K (e) In which direction will the reaction proceed to reach equilibrium? to the left l (b) What are the new concentrations of reactants and products after the system reaches equilibrium? cocI2] Col IC2]

Explanation / Answer

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

equil     0.225 M        0.125 M 0.125 M

added     0.414 M         -         -

re-equil 0.414-x        0.125+x   0.125+x

Kc = [Cl2]*[CO]/[COCL2]

a) direction of reaction proceeds = to the right

0.0698 = ((0.125+x)^2/(0.414-x))

x = 0.0372

[COCL2] = 0.414-0.0372 = 0.3768 M

[Cl2] = 0.125+0.0372 = 0.1622 M

[CO] = 0.125+0.0372 = 0.1622 M

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