Molar concentration calculator (mol/L)
Type the dissolved mass and the molar mass (or the number of moles), then the volume of solution: you get the molar concentration.
Result
0.2 mol/LMolar concentration
- In mmol/L
- 200 mmol/L
- Amount of substance
- 0.1 mol
- Mass concentration
- 11.688 g/L
Inputs
- I know
- The mass
- Dissolved mass
- 5.844
- Molar mass
- 58.44
- Volume of solution
- 500
- Volume unit
- milliliters (mL)
How it is calculated
Amount of substance n = mass ÷ molar mass (in mol).
Result
Molar concentration
- In mmol/L
- 200 mmol/L
- Amount of substance
- 0.1 mol
- Mass concentration
- 11.688 g/L
How it is calculated
- Amount of substance n = mass ÷ molar mass (in mol).
- Molar concentration c = n ÷ V, with V in liters of solution (not of solvent).
- Mass concentration = mass ÷ V (in g/L).
Example
5.844 g of salt (NaCl, 58.44 g/mol) in 500 mL of solution: n = 0.1 mol, c = 0.1 ÷ 0.5 = 0.2 mol/L, so 200 mmol/L and 11.688 g/L.
Good to know
- Calculation only: it gives no preparation procedure. Follow your lab’s safety rules.
- V is the final volume of the solution, not the volume of water added.
- To find the molar mass of a compound, use the molar mass calculator.
Sources
- IUPAC, Compendium of Chemical Terminology (Gold Book), “amount concentration”
Frequently asked questions
What is this tool used for?
Type the dissolved mass and the molar mass (or the number of moles), then the volume of solution: you get the molar concentration.
How is the result calculated?
Amount of substance n = mass ÷ molar mass (in mol).
What should I check before using the result?
Calculation only: it gives no preparation procedure. Follow your lab’s safety rules.