Suppose That Ammonia, Applied to a Field as a Fertilizer

Multiple Choice

Suppose that ammonia, applied to a field as a fertilizer, is washed into a farm pond containing 3.0 * 10⁶ L of water. If the pH of this pond is found to be 9.81, what volume of liquid ammonia found its way into the pond? [Given: K_b(NH₃) = 1.8 * 10^-5; the density of liquid ammonia is 0.771 g/cm³]

A) 15 L
B) 25 L
C) 11 L
D) 19 L
E) 320 L