Answer
Diagrams (a), (b) and (c) represents an equilibrium mixture.
Work Step by Step
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)
$$K_c = \frac{(4)^2}{(2)(2)} =4 $$
