Year 10 - Science
Solutions
Separating substances
Study Hub
Study Guides
This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit explores purification techniques, including filtration, crystallisation, and distillation. It explains formulations, uses chromatographic methods to identify pure and impure substances, and interprets chromatograms with Rf values. The emphasis is on accurate measurements.
Lesson Summary
You will learn to explain how solutions are formed and how to use state symbols in equations.
Key Notes
- A solution is a type of mixture made of a solvent and a solute.
- Solutions form due to a solute dissolving in the solvent.
- Solubility is a measure of how well a chemical dissolves (soluble/insoluble).
- Many substances can act as a solvent; however, water is the most common.
- State symbols are used to identify the three states of matter and aqueous solutions in chemical equations.
Vocabulary To Learn
- solute: A solute is a substance that has dissolved into a solvent.
- solvent: A solvent is a liquid into which a solute dissolves.
- soluble: When a substance dissolves in a solvent, it is described as soluble in that solvent.
- insoluble: A substance that does not dissolve in a particular solvent is described as insoluble.
- state symbol: A state symbol is used in chemical equations to indicate the physical state of a substance.
Common Mistakes To Avoid
- Some think that because a solute can no longer be seen, or that a solvent becomes coloured when a solute dissolves, that the creation of a solution is a chemical change.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
A solution is a type of mixture made of a solvent and a solute. Solutions form due to a solute dissolving in the solvent.
2. Define this scientific word and use it in context. 'solute'
A solute is a substance that has dissolved into a solvent. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Some think that because a solute can no longer be seen, or that a solvent becomes coloured when a solute dissolves, that the creation of a solution is a chemical change. Correction: Create a salt solution, then evaporate the water (leaving salt crystals) to demonstrate that the salt and water have not chemically combined and therefore dissolving (to create a solution) is a physical change.
More Lessons In This Unit
- Chromatography: paper Study Guide
- Chromatography: separating a mixture of inks Study Guide
- Comparing types of chromatography: including gas chromatography Study Guide
- Crystallisation Study Guide
- Distillation: fractional distillation Study Guide
- Distillation: separating a mixture of inks Study Guide
- Distillation: simple distillation Study Guide
- Filtration Study Guide
- Interpreting chromatograms Study Guide
- Potable water Study Guide
- Potable water: including sedimentation Study Guide
- Separating mixtures Study Guide
- Separating mixtures (including formulations) Study Guide
- Wastewater treatment Study Guide
- Water sample analysis: dissolved solids Study Guide
- Water sample analysis: distillation Study Guide
- Water sample analysis: pH Study Guide
Browse all guides in the Year 10 Science guide library.