Solution preparation calculator (m = C × V × M)
m = C × V × M
Enter the target molar concentration, the final volume of solution to prepare, and the molar mass of the solute: the tool computes the mass of solute to weigh out, from the formula m = C × V × 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 & formulasm = C × V × M
m = C × V × M
The mass of solute to weigh out is the product of the target molar concentration, the volume of solution to prepare, and the molar mass of the solute.
- C
- · target molar concentration of the final solution.
- V
- · final volume of solution to prepare.
- M
- · molar mass of the solute, in g/mol.
- m
- · mass of solute to weigh out to obtain this solution.
Validity domainUse the actual molar mass of the weighed product: for a hydrated salt (e.
Use the actual molar mass of the weighed product: for a hydrated salt (e.g. CuSO₄·5H₂O), the molar mass of the hydrate differs from that of the anhydrous compound, mixing up the two directly skews the computed mass.
ExampleTo prepare 500 mL of a 0.
To prepare 500 mL of a 0.1 mol/L sodium chloride (NaCl, M = 58.44 g/mol) solution, weigh out 2.922 g of NaCl (0.1 mol/L × 0.5 L × 58.44 g/mol).