expressing concentration

solute: the thing that gets dissolved

solvent: the thing that does the dissolving

Increasing concentration

• add more solute to the same volume of solvent.

• evaporate some of the solvent from the solution, keeping the mass of the solute the same whilst decreasing the volume of the solvent.

concentration = amount of solute / volume of solution

concentration is measured in g/dm3 ( 3 meaning cubed )

the solute is measured in grams

the volume of solution is measured dm3

cm3 —> dm3 = divide by 1000

dm3 —> cm3 = multiply by 1000