## Chemistry (4th Edition)

1. Write the equilibrium constant expression: - The exponent of each concentration is equal to its balance coefficient. $$K_c = \frac{[Products]}{[Reactants]} = \frac{[ Z ]}{[ X ][ Y ]^{ 2 }}$$ 2. Calculate Kc for both mixtures: Left mixture: $$\frac{4}{(4)(4)^2} = 0.0625$$ Therefore, more product has to be formed in order to reach equilibrium. (Kc = 3): Right. Right mixture: $$\frac{(9)}{(3)(1)^2} = 3$$ The mixture is already at equilibrium: Neither.