Year 10 - Science
Making a pure dry sample of a soluble salt
Making salts
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 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 carry out a multistage chemical procedure to make a pure dry sample of a soluble salt.
Key Notes
- Reacting a metal oxide with an appropriate acid can form a desired salt and water.
- Adding metal oxide to excess ensures that the acid fully reacts to form salt and water.
- Excess metal oxide can be removed by filtration so that the filtrate contains only salt and water.
- Water can be removed from the salt by evaporation.
Vocabulary To Learn
- soluble: When a substance dissolves in a liquid, it is described as soluble in that liquid.
- excess reactant: any reactant present in a greater amount than is necessary to completely react with the limiting reactant
- filtration: a technique to separate insoluble solids from a liquid by passing the mixture it is in through a filter
- crystallisation: a process that forms solid crystals from a saturated solution by evaporating the solvent
Common Mistakes To Avoid
- Pupils often do not understand that observing excess metal oxide in the reaction mixture means that the acid has fully reacted.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Reacting a metal oxide with an appropriate acid can form a desired salt and water. Adding metal oxide to excess ensures that the acid fully reacts to form salt and water.
2. Define this scientific word and use it in context. 'soluble'
When a substance dissolves in a liquid, it is described as soluble in that liquid. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Pupils often do not understand that observing excess metal oxide in the reaction mixture means that the acid has fully reacted. Correction: Emphasise how to observe the end of the reaction and what these observations mean, i.e. excess metal oxide in the reaction mixture or using pH paper to indicate the solution is neutral. Both are evidence of the acid having fully reacted.
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 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
- 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
Browse all guides in the Year 10 Science guide library.