Separate toluene from acetone and isopropyl alcohol
Multiple washes with smaller quantities of water will be more efficient than "just adding a lot of water" in a single wash. The toluene will be "purified" further with each successive wash. Some toluene will be lost with each wash also to the degree of it's solubility in water at the temperature of the extraction (about 0.03% soluble in water at room temperature). As stated in a comment however, distillation would be a superior method for recovering the pure toluene.