You are given a saturated solution of sodium acetate and are told to find the solubility of this chemical in water. The solution is already saturated, so we know that the maximum amount of chemical has been dissolved in the water. So since we need to find the solubility in units of grams per 100 mL, simply take 100 mL of the solution and put it in a separate flask. Then heat it up to boil the water away, thus leaving the sodium acetate as a dry white solid sitting in the flask. Then take the sodium acetate and weigh it on a balance. This will be the solubility of sodium acetate in 100 mL of water at room temperature.