Solvent: The solvent would be the milk (or water, depending on what you used) Solute: Chocolate powder Solution: The hot chocolate itself, since a solution is a homogeneous mixture, in which two or more substances are used
Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.