Consider the Gibbs energies at 25 ∘ C.

Substance Δ∘f (kJ·mol−1)
Ag+(aq) 77.1
Cl−(aq) −131.2
AgCl(s) −109.8
Br−(aq) −104.0
AgBr(s) −96.9
(a) Calculate Δ∘rxn for the dissolution of AgCl(s) .
(b) Calculate the solubility-product constant of AgCl.
(c) Calculate Δ∘rxn for the dissolution of AgBr(s) .
(d) Calculate the solubility-product constant of AgBr.