Question

How many grams of cacl2 are needed to make 713.9 g of a solution that is 29.0% (m/m) calcium chloride in water? note that mass is not technically the same thing as weight, but % (m/m) has the same meaning as % (w/w)?

Answer 1

The grams of CaCl2 needed to make 713.9 g of solution that is 29.0 %(m/m)is calculated as below
convert 29% into fraction = 29/100

therefore the mass of CaCl2 needed

=713 solution x 29/100=206.77 grams of CaCl2 is needed