Question

Determine the direction of reaction if 1.00 M NOCl is combined with 0.500 M NO and 0.500 M Cl2 in a sealed flask. No reaction occurs. Reaction proceeds to the right toward the products. Reaction proceeds to the left toward the reactants. Reaction proceeds to the left toward the products.

Answer 1

Answer:

Reaction proceeds to the left toward the reactants.

Explanation:

Hello,

In this case, since the reaction is:

$2NOCl (g) \rightleftharpoons 2NO(g) + Cl_2 (g); Keq= 4.4 x10^{-4}$

For the given amounts, one computes the reaction quotient:

$Q=\frac{[NO]^2[Cl_2]}{[NOCl]^2} =\frac{(0.500M)^2(0.500M)}{(1.00M)^2} =0.125$

Thus, since Q>Keq, the reaction will form more NOCl in order to increase its concentration and therefore reestablish the equilibrium, for that reason the answer is reaction proceeds to the left toward the reactants.

Regards.