Answer:
The concentration of a saturated solution of potassium chloride that is prepared by dissolving 45 g KCl in 100.0 g water at 60 degrees Celsius can be calculated as follows:
Find the total mass of the solution:
Mass of solution = Mass of solute + Mass of solvent
Mass of solution = 45 g KCl + 100.0 g water
Mass of solution = 145.0 g
Calculate the mass percent of KCl in the solution:
Mass percent = (Mass of solute / Mass of solution) x 100%
Mass percent = (45 g KCl / 145.0 g solution) x 100%
Mass percent = 31.03%
Therefore, the concentration of the saturated solution of potassium chloride is 31.03% by mass at 60 degrees Celsius.