Year 10 - Science
Concentration of solutions
Making salts
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit explores empirical formulae, balanced chemical and ionic equations, gas identification, acid reactions, and pH as a measure of hydrogen ion concentration. It covers separation techniques and focuses on planning experiments, accurate measurements, safety, and communicating findings.
Lesson Summary
You will learn to explain what is meant by the concentration of a solution and calculate the concentration of various solutions.
Key Notes
- 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.
Vocabulary To Learn
- 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
Common Mistakes To Avoid
- Pupils often confuse the chemical definitions for 'concentration' and 'strength'.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key 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.
2. Define this scientific word and use it in context. 'solution'
substance formed when a solute dissolves into a solvent. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Pupils often confuse the chemical definitions for 'concentration' and 'strength'. Correction: Stress that concentration is a measure of particles interspersed throughout a specific volume of liquid.
More Lessons In This Unit
- Acid-base reactions Study Guide
- Acid-base reactions (carbonates as bases) Study Guide
- Adapting a multistep chemical procedure for making a pure dry salt Study Guide
- Change in pH: practical Study Guide
- Chemical reactions of acids with metals and metal carbonates Study Guide
- Comparing concentration with strength Study Guide
- Concentration of solutions: using moles Study Guide
- Concentration of solutions: using moles (RAM 1 d.p.) Study Guide
- Describing salts Study Guide
- Hazard symbols and equipment Study Guide
- Ionic equations: salt formation Study Guide
- Making a pure dry sample of a soluble salt Study Guide
- pH scale and indicators Study Guide
- Solubility rules Study Guide
- Titrations: analytical technique Study Guide
- Titrations: calculating an unknown concentration Study Guide
- Titrations: calculating an unknown concentration (RAM 1 d.p.) Study Guide
- Titrations: making soluble salts Study Guide
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