Chemistry · Ch 2 — Introduction to Analytical Chemistry
Mass percent
Mass percent
Mass percent (also called weight percent, written w/w %) is one of the simplest ways to express how concentrated a solution is. It is defined as the mass of the solute divided by the total mass of the solution (solute plus solvent), expressed as a percentage: mass percent . Because it uses masses throughout rather than a volume, mass percent has the practical advantage of not changing with temperature (unlike molarity, which depends on the volume of the solution). It is worked out in practice simpl …
Worked out. Worked example: a solution is prepared by adding 2 g of a substance A to 18 g of water. Mass percent of A . The mass of the solution in the denominator is always the sum of the solute mass and the solvent mass, not the solvent …