The equilibrium constant for the reaction 2ICl(g) I2(g) + Cl2(g) is K = 0.11....?

Question

What is the equilibrium concentration of ICl (g) if the equilibrium concentrations of I2(g) and Cl2(g) are both 0.076 M?

A. 0.12 M
B. 0.46 M
C. 0.0053 M
D. 0.23 M

Answer 1

Let x equal the concentration of ICl at equilibrium.

Then (0.076) squared /x squared = 0.11.

Now solve for x.