Molality of NaCl: 10 g in 500 g Water
Calculate the molality of a sodium chloride solution with 10 g NaCl (molar mass 58.44 g/mol) dissolved in 500 g of water.
How to use this tool
- Enter solute mass, molar mass of solute and solvent mass in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your molality and the full breakdown beneath it.
This example calculates the molality of NaCl when 10 grams are dissolved in 500 grams of water, a common lab preparation.
Frequently asked questions
- How is molality different from molarity?
- Molarity (mol/L) is moles per litre of solution; molality (mol/kg) is moles per kilogram of solvent. Molality is temperature-independent because mass doesn't change with temperature, while volume does.
- What are colligative properties?
- Properties that depend only on the number of solute particles, not their identity: boiling-point elevation, freezing-point depression, osmotic pressure, vapour pressure lowering. Note: the shown Kb/Kf values assume non-electrolyte solutes.