1Solution Preparation
Chemical subscripts render automatically while you type.
Uses the same Mw above. Enter any 2 values below to solve the third.
Weight-based concentration
Molality uses solvent mass instead of final solution volume, so it stays stable across temperature-driven volume changes.
1
Formula / Mw
Input formula to get Mw
→
2
Fill Any 2
Enter the pair you know best
→
3
Auto Result
The final field solves automatically
2Dilution
Calculation Results
Calculation Formulas
Molarity
m = C × V(L) × Mw
Molality
m = b × W(kg) × Mw
Dilution
C1V1 = C2V2
- Mass (m): The mass of the solute in grams (g).
- Molar Mass (Mw): The mass per mole of substance (g/mol).
- Volume (V): The final solution volume used in molarity calculations.
- Molarity (C): Moles of solute per liter of solution.
- Molality (b): Moles of solute per kilogram of solvent.
- Solvent Mass (W): The solvent-only mass used in molality calculations, not total solution mass.
Scientific Knowledge Base
M
Molarity (M)
Molarity is moles per liter of solution, which makes it ideal for volumetric preparation and dilution.
b
Molality (b)
Molality uses solvent mass instead of total volume, so it is more stable when temperature shifts the solution volume.
C1V1 = C2V2
Dilution Principle
Dilution only adds solvent, so the moles of solute stay constant before and after the dilution step.
lab
When to use which
Use molarity for final-volume prep, molality for solvent-mass prep, and C1V1=C2V2 for stock solution dilution.