An aqueous NaCl solution weighs 453 g. The mass of dissolved NaCl is 12.45 g. What is the mass percent of NaCl?
To calculate the mass percent of NaCl in the solution, use the formula:
Mass percent = (mass of NaCl / total mass of solution) x 100
First, find the total mass of the solution by subtracting the mass of dissolved NaCl from the total solution weight:
Total mass of solution = 453 g - 12.45 g = 440.55 g
Now, plug the values into the formula:
Mass percent = (12.45 g / 440.55 g) x 100 = 2.82%
Therefore, the mass percent of NaCl in the aqueous solution is 2.82%.