## Chemistry (4th Edition)

1. Write the equilibrium constant expression: - The exponent of each concentration is equal to its balance coefficient. $$K_c = \frac{[Products]}{[Reactants]} = \frac{[ AB ]^{ 2 }}{[ A_2 ][ B_2 ]}$$ (a) $$K_c = \frac{(2)^2}{(2)(1)} = 2$$ (b) $$K_c = \frac{(2)^2}{(1)(2)} = 2$$ (c) $$K_c = \frac{(4)^2}{(2)(4)} = 2$$ (d) $$K_c = \frac{(4)^2}{(2)(2)} =4$$