How to use the mole fraction to molarity calculator
Convert the mole fraction of a solute in a binary solution into molarity, using the solution density. Enter mole fraction of solute, solution density, solute molar mass, solvent molar mass in the fields above; the molarity is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “mole fraction to molarity”, “convert mole fraction to mol per litre”, “binary solution concentration”, “calculate mole fraction to molarity”, “find molarity”.
Formula
Variables
- xs — Mole fraction of solute
- d — Solution density (g/mL)
- Ms — Solute molar mass (g/mol)
- Msol — Solvent molar mass (g/mol)
Worked example
With mole fraction of solute = 0.1, solution density = 1.2 g/mL, solute molar mass = 60 g/mol, solvent molar mass = 18 g/mol, the calculator gives molarity ≈ 5.405405 mol/L.
Frequently asked questions
What is the mole fraction to molarity calculator used for?
Convert the mole fraction of a solute in a binary solution into molarity, using the solution density. It helps with questions such as “mole fraction to molarity”, “convert mole fraction to mol per litre”, “binary solution concentration”.
What is the formula for the mole fraction to molarity calculation?
Molarity (mol/L) = 1000 × d × xs / (xs × Ms+(1-xs) × Msol). Here xs is mole fraction of solute, d is solution density (g/mL), Ms is solute molar mass (g/mol), Msol is solvent molar mass (g/mol).
What inputs do I need for the mole fraction to molarity calculator?
You need mole fraction of solute, solution density in g/mL, solute molar mass in g/mol, solvent molar mass in g/mol. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the mole fraction to molarity calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the mole fraction to molarity result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.