What is meant by the concentration of a solution? Explain by giving an example.
The concentration of a solution is the amount of solute present in a given amount of solution or solvent. This can be mathematically written as:
The concentration of solution =
Or
The concentration of solution =
Mainly one expresses concentration in 2 ways:
(a) Mass by mass percentage:
(b) Mass by volume percentage:
Eg:
Consider 30g of sugar (solute) dissolved in 150g of water (solvent).
Then the mass of solute = 30g
Mass of solvent = 150g
Mass of solution = Mass of solute + mass of solvent
= 30+150
= 180g
Therefore the concentration of solute expressed using mass by mass percentage is:
Mass by mass percentage of solution = (Mass of solute/Mass of solution) x 100
= 16.6%