33. The solubility of solid silver chromate, Ag2CrO4 (Ksp =9.0 × 10-12) in 0.500 M solution of K2CrO4 at 25oC is(A) 1.8×10-11(B) 4.2×10-6(C) 2.1×10-6(D) 1.3×10-4