Question

Carbonyl chloride (COCl2), also called phosgene, was used in World War I as a poisonous gas. The equilibrium concentrations for the reaction between carbon monoxide and molecular chlorine to form carbonyl chloride at a certain temperature are [CO] = 0.0210 M, [Cl2] = 0.0450 M, and [COCl2] = 0.204 M. CO(g) + Cl2(g) ⇆ COCl2(g) Calculate the equilibrium constant (Kc).

Answer 1

Answer:

The equilibrium constant of the given equilibrium is 377.77.

Explanation:

Equilibrium constant is the ratio of concentration of products to the concentration of reactants raised to the power equal to their stoichiometric coefficients in balanced chemical equation. It is expressed as $K_{c}$

$CO(g) + Cl_2(g) \rightleftharpoons COCl_2(g)$

Concentration of the $[CO] = 0.0210 M$

Concentration of the $[Cl_2] = 0.0450 M$

Concentration of the $[COCl_2] = 0.204 M$

The equilibrium constant of the given equilibrium reaction is given by:

$K_c=\frac{[COCl_2]}{[CO][Cl_2]}$

$K_c=\frac{0.204 M}{0.0120 M \times 0.0450 M}=377.77$

The equilibrium constant of the given equilibrium is 377.77.