posted by Anon .
You need to dissolve CaCl2 in water to make a mixture that is 31.5% calcium chloride by mass. If the total mass of the mixture is 254.6 g, what masses of CaCl2 and water should be used?
0.315*254.6g= Mass of CaCl2
254.6g-Mass of CaCl2=Mass of H2O