Molality is defined as the number of moles of solute per 1 (kg) of solvent.

• Solute = particles you dissolve
• Solvent = the liquid you use for dissolving the particles

Example

Calculate molality (m) of 29.8 g of glucose (C₆H₁₂O₆) dissolved in 622.8 g of water

Symbol	Element	Atomic weight	Atoms
C	Carbon	12.01	6
H	Hydrogen	1.008	12
O	Oxygen	16.00	6

Step 1. Find the molar mass of glucose

Step 2. Find the number of moles of glucose

Step 3. Find the concentration of the solution

29.8 g of glucose (C₆H₁₂O₆) dissolved in 622.8 g of water
The concentration of the sugar solution is 0.267 m.