Question

Determine the standard free energy change, ΔGf°, for the formation of S2− (aq) given that the ΔGf° for Ag+ (aq) and Ag2S(s) are 77.1 kJ/mole and −39.5 kJ/mole respectively, and the solubility product for Ag2S(s) is 8 ×× 10−51.

Answer 1

∆G° S2- =- 129.7 kj