Question

1. H2S(aq)⇌HS−(aq)+H+(aq),  H2S(aq)⇌HS−(aq)+H+(aq),   K1K1K_1 = 9.45×10⁻⁸, and
2. HS−(aq)⇌S2−(aq)+H+(aq),  HS−(aq)⇌S2−(aq)+H+(aq),   K2K2K_2 = 1.25×10⁻¹⁹,

what is the equilibrium constant KfinalKfinalK_final for the following reaction?

S2−(aq)+2H+(aq)⇌H2S(aq)S2−(aq)+2H+(aq)⇌H2S(aq)

Enter your answer numerically.

Given the two reactions

3. PbCl2(aq)⇌Pb2+(aq)+2Cl−(aq),  PbCl2(aq)⇌Pb2+(aq)+2Cl−(aq),   K3K3K_3 = 1.78×10⁻¹⁰, and
4. AgCl(aq)⇌Ag+(aq)+Cl−(aq),  AgCl(aq)⇌Ag+(aq)+Cl−(aq),   K4K4K_4 = 1.18×10⁻⁴,

what is the equilibrium constant KfinalKfinalK_final for the following reaction?

PbCl2(aq)+2Ag+(aq)⇌2AgCl(aq)+Pb2+(aq)PbCl2(aq)+2Ag+(aq)⇌2AgCl(aq)+Pb2+(aq)

Express your answer numerically.

Answer 1