Answer to Question #142487 in General Chemistry for Jerald Bangayan

Question

Did the water take more time to boil when electrocyte (NaCl) solute was added?why?

Answer 1

Salt water boils at a higher temperature than fresh water, therefore, under the same heating conditions, fresh water will boil faster, salty water will boil later. Water molecules bind to salt ions - a hydration process takes place. The bond between water molecules is weaker than the bond formed by hydration. Therefore, a fresh water molecule is easier (at a lower temperature) to detach from its "environment" - that is, roughly speaking, evaporates. And in order for a water molecule with dissolved salt to "break free from the embrace" of salt and other water molecules, more energy is required, that is, a higher temperature.