Which of the following concentration units will not change if a solution is heated?
A) %(w/w)
B) %(w/v)
C) both %(w/w) and %(w/v)
D) neither %(w/w) or %(w/v)

Question

Quizplus · Accepted Answer

%(w/w) represents the mass of solute divided by the total mass of the solution. Since both the mass of solute and the total mass of the solution increase by the same proportion when a solution is heated, the ratio of these two masses (i.e., %(w/w)) remains constant. On the other hand, %(w/v) represents the mass of solute divided by the volume of the solution. Heating a solution can cause the volume to change, resulting in a change in the %(w/v) concentration unit.

Which of the Following Concentration Units Will Not Change If