Molarity calculator (C = n / V)
C = n / V
Calculate any one of the three quantities linked by C = n / V: molar concentration, amount of substance (n), or volume (V). A secondary mode converts a mass into an amount of substance from the molar mass (n = m / M).
Awaiting the quantities required for the calculation.
Scientific dossier
What the tool computes, what it assumes, where it stops being valid, and where its data comes from.
Method & formulasC = n / V
C = n / V
n = m / M
C = n / V relates molar concentration, amount of substance, and volume. When the amount of substance is obtained by weighing, n = m / M computes it from the mass and molar mass of the solute.
- C
- · molar concentration of the solution.
- n
- · amount of substance, in moles.
- V
- · volume of the solution.
- m, M
- · mass of the solute and its molar mass (secondary mode).
Validity domainThe main mode only handles molar concentration (mol/L): for a mass concentration (g/L), use the solution preparation calculator instead.
The main mode only handles molar concentration (mol/L): for a mass concentration (g/L), use the solution preparation calculator instead. The mass → amount of substance mode assumes a correct molar mass for the actually weighed solute (watch out for hydrated forms).
Example0.
0.5 mol of solute dissolved in 2 L of solution gives a concentration of 0.25 mol/L (C = n / V = 0.5 / 2).