Question

Part A. Given the two reactions:

H2S⇌HS−+H+, K1 = 9.52×10−8,

HS−⇌S2−+H+, K2 = 1.18×10−19, what is the equilibrium constant Kfinal for the following reaction? S2−+2H+⇌H2S

Enter your answer numerically.

Part B. Given the two reactions:

PbCl2⇌Pb2++2Cl−, K3 = 1.87×10^−10

AgCl⇌Ag++Cl−, K4 = 1.22×10^−4

what is the equilibrium constant Kfinal for the following reaction? PbCl2+2Ag+⇌2AgCl+Pb2+

Express your answer numerically.