posted by Anonymous on .
Does the molarity change with the volume? For example we did an experiment in lab with one trial containing 0.1 M KI at 100 mL and another with 50mL. So does the molarity (M) change with volume change?
No and yes. The answer to your question is no, the molarity is the same whether the volume is 50 mL, 25 mL, 100 mL or 1 L. However, since the volume of a liquid changes with temperature, the molarity DOES change as the temperature (and volume) changes. The point is that if we make up a solution that is supposed to be 1 M and it is in a 1 L volumetric flask and the temperature of the room is 35 C, the flask is calibrated to hold 1 L at 20 C (not 35 C); therefore, the solution will NOT be 1 M.