Chemical Equilibrium Examples

Find the equilibirium concentrations when starting with 0.50 M H$_2$ and 0.50 M Br$_2$

H$_2$ + Br$_2$ $\leftrightharpoons$ 2 HBr , K$_C$ = 143

0.20 M I$_2$ is placed in a reaction vessel. Find the concentrations of I$_2$ and I at equilibrium.

I$_2$ (g) $\leftrightharpoons$ 2 I (g) , K$_C$ = 3.8 x 10$^{-5}$

A 3.050 L reaction vessel contains 0.3500 mol CO, 0 mol Cl$_2$, 0.05500 mol COCl$_2$. Find the molarity of Cl$_2$ at equilibrium.

CO + Cl$_2$ $\leftrightharpoons$ COCl$_2$ , K$_C$ = 1200

A 2.5 L reaction vessel contains 0.55 mol PCl$_5$, 0.55 mol PCl$_3$, and 0 mol Cl$_2$. Find the molarity of Cl$_2$ at equilibrium.

PCl$_5$ $\leftrightharpoons$ PCl$_3$ + Cl$_2$ , K$_C$ = 3.8 x 10$^{-2}$