Answer to Question #341927 in General Chemistry for Draco

Question

A solution is prepared at 20^oC and its concentration is expressed in two different units; Molarity and Molality. The solution is then heated to 88^oC. Which of the concentration units will change? 

Answer 1

Molarity will change, because molarity is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution. When temperature changes, then volume of solution changes, so molarity also changes