Calculate the molarity (molar concentration) of a solution from moles of solute and volume.
$$M = \frac{n}{V}$$
Where n = moles of solute (mol), V = volume of solution (L), M = molarity (mol/L).
0.5 mol of NaCl dissolved in 2 L of water:
$$M = \frac{0.5}{2} = 0.25 \text{ mol/L}$$
Molarity (M) is the number of moles of solute dissolved per litre of solution. It is the standard way to express solution concentration in chemistry.
Enter moles of solute in mol and volume of solution in litres (L). The result is in mol/L (also written as M).
No. Molarity is moles per litre of solution; molality is moles per kilogram of solvent. They differ when the solvent is not water or when temperature changes significantly.
