Concentration of solutions: using moles (RAM 1 d.p.)
I can explain what is meant by the concentration of a solution and calculate it for various solutions.
Concentration of solutions: using moles (RAM 1 d.p.)
I can explain what is meant by the concentration of a solution and calculate it for various solutions.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Concentration of an aqueous solution is the mass of solute dissolved in 1 dm³ of distilled water, in g/dm³.
- The mass of one mole of solute is equal to the relative mass of the solute measured in grams.
- Concentration can be expressed in g/dm³ or mol/dm³.
- Equal volumes of solutions of the same concentration (in mol/dm³) have equal numbers of dissolved solute particles.
- Volume can be measured in various units; 1 dm³ is equivalent to 1000 cm³.
Keywords
Solution - Substance formed when a solute dissolves into a solvent.
Solute - A substance that has dissolved into a solvent.
Concentration - The amount of a solute dissolved in a certain volume of solvent.
Dilute - A low concentration of a solute in a solution.
Moles - 6.02 × 10²³ of something. The mass of a mole of a substance is its relative mass expressed in grams.
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.
To help you plan your year 10 chemistry lesson on: Concentration of solutions: using moles (RAM 1 d.p.), download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 chemistry lesson on: Concentration of solutions: using moles (RAM 1 d.p.), download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 4 chemistry lessons from the Making salts unit, dive into the full secondary chemistry curriculum, or learn more about lesson planning.
Equipment
Each station: common solute, spatula, weigh 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
Starter quiz
6 Questions
a substance formed when a solute dissolves into a solvent
a substance that has dissolved into a solvent
a substance into which a solute dissolves