what is the relation between molarity and mass%
Answers
Answer:
realtion is explained--
Explanation:
Molarity is defined as number of moles divided by the volume (in liters). Molality is defined as the number of moles divided by the mass of the solution (in kg). ... Hence we derive the relation between molarity and molality.
Answer:
The volume does change when you dissolve something. You're putting molecules in -- the total volume must change, however slightly.
It doesn't mean that the total volume will increase exactly by the volume of solute you added.. That depends on the lattice structure of the solute (if solid), and the interactions with the solvent. A 1cm^3 crystal of NaCl dropped into 100cm^3 of water won't increase the volume to 101 because when it dissolves, the lattice structure breaks down and water will surround each molecule of NaCl (actually each atom of Na+ and Cl-) separately..
But at the end of the day, the volume does still increase because now you have all those atoms of Na and Cl floating around in there, and they do after all have some volume, even if it's tiny. It starts to add up when you add more solute..