Chemistry · EQUILIBRIUM

The pH of an aqueous solution of a salt formed from a weak acid and a weak base is given by the relation:

1. A
   \( \text{pH} = 7 + \frac{1}{2}(\text{p}K_a - \text{p}K_b) \)
2. B
   \( \text{pH} = 7 - \frac{1}{2}(\text{p}K_a - \text{p}K_b) \)
3. C
   \( \text{pH} = 7 + \frac{1}{2}(\text{p}K_a + \text{p}K_b) \)
4. D
   \( \text{pH} = 14 + \frac{1}{2}(\text{p}K_a - \text{p}K_b) \)