Concentration of solutions
I can explain what is meant by the concentration of a solution and calculate the concentration of various solutions.
Concentration of solutions
I can explain what is meant by the concentration of a solution and calculate the concentration of various solutions.
Lesson details
Key learning points
- Concentration of a solution is the mass of solute dissolved in 1 dm³ of distilled water, in g/dm³.
- The more solute that is dissolved, the more concentrated the solution.
- Solutions can be diluted (i.e. made less concentrated) by increasing the volume of distilled water.
- Diluting solutions with distilled water ensures no other substances are present in the solution.
- Volume can be measured in various units; 1 dm³ is equivalent to 1000 cm³.
Common misconception
Pupils often confuse the chemical definitions for 'concentration' and 'strength'.
Stress that concentration is a measure of particles interspersed throughout a specific volume of liquid.
Keywords
Solution - substance formed when a solute dissolves into a solvent
Solute - a substance that has dissolved into a solvent
Solvent - a substance into which a solute dissolves
Concentration - the amount of a solute dissolved in a certain volume of solvent
Dilute - a low concentration of a solute in a solution
Equipment
Each station: common solute, spatula, weighing boat, balance, measuring cylinder, access to distilled water, conical flask/beaker + stirring rod.
Content guidance
- Risk assessment required - equipment
- Depiction or discussion of violence or suffering
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
kg
cm³
℃
N
g/dm³
substance formed when a solute dissolves into a solvent
a substance that has dissolved into a solvent
a substance into which a solute dissolves