Question

You need to dissolve CaCl2 in water to make a mixture that is 29.5% calcium chloride by mass. If the total mass of the mixture is 289.3 g, what masses of CaCl2 and water should be used?

Answer 1

Ans. Required mass of CaCl2 = 29.5% (w/w) of the mass of mixture

                                                = 29.5% x 289.3 g = 85.3435 g = 85.34 g

# Mass of water = Mass of Mixture – Required mass of CaCl₂

                                    = 289.3 g – 85.34 g = 204.96 g