The change in the Gibbs free energy for dissolving solute in a saturated solution is a. positive. b. negative. c. zero. d. positive at low temperatures and negative at high temperatures.

Negative

Explanation:

For a solution to form, the change in Gibbs free energy must be negative for dissolving. When a solute dissolves in a saturated solution, ΔH (enthalpy change) is negative and ΔS (entropy change) is positive, giving rise to a large negative ΔG (change in gibbs free energy) and a very high solubility.