Final answer:
To result in the salting out of cyclohexanone, one should add sodium sulfate (Na2SO4), which effectively decreases the solute's solubility.
Step-by-step explanation:
The addition of which compound results in the salting out of cyclohexanone? The correct answer is a. Addition of sodium sulfate (Na2SO4). Salting out is a process where a solvent and a solute (in this case, cyclohexanone) are separated by adding a salt that decreases the solubility of the solute in the solvent.
Sodium sulfate is an effective salting-out agent because it can decrease the solubility of organic compounds in water due to its ability to compete for hydration with the solvent molecules.