Weight-By-Weight

03/17/26

“How can we quantify the percentage of weight that a certain substance takes up in a solution?”

Solutions are made up of more than one substance. Sometimes we want to quantify the mass percentage that one of the substances makes up in the solution. The Weight-By-Weight variable represents this. For example, say a solution is made up of 20 grams of potassium chloride and 80 grams of water for a total 100 g of a substance. The weight-by-weight for potassium chloride is 20%.