What is the practical difference between #"molarity"#, and #"molality"#?

1 Answer
May 2, 2017

Answer:

At low to moderate concentrations IN AQUEOUS solution, the difference is minimal and can be ignored.......

Explanation:

By definition................

#"Molarity"="Moles of solute (mol)"/"Volume of solution (L)"#, and thus has units of #mol*L^-1#.

#"Molality"="Moles of solute (mol)"/"Mass of solvent (kg)"#, and thus has units of #mol*kg^-1#.

Molality is often preferred in that it is independent of density, and thus independent of temperature.