what is the diffrence between molarity and molality - Chemistry -

Question

what is the diffrence between molarity and molality

Nayan Kumar Singh · Accepted Answer

Molarity and molality are both measures of concentration of
solutions One is the ratio of moles to volume of the solution and
the other is the ratio of moles to the mass of the solution

Molarity, also known as molar concentration, is the number of
moles of a substance per liter of solution Solutions labeled with
the molar concentration are denoted with a capital M A 1 0 M
solution contains 1 mole of solute per liter of solution
Molality is the number of moles of solute per kilogram of
solvent It is important the mass of solvent is used and not the
mass of the solution Solutions labeled with molal concentration are
denoted with a lower case m A 1 0 m solution contains 1 mole of
solute per kilogram of solvent