Year 10 - Science
Acid-base reactions (carbonates as bases)
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 identify bases, predict the names and states of products from a neutralisation reaction and compare the properties of metal and non-metal oxides.
Key Notes
- A base is a substance that neutralises an acid to make salt and water only (this is a neutralisation reaction).
- Hydroxides are generally soluble bases (they contain OH⁻ ions).
- Metal oxides are bases that are generally insoluble.
- Non-metal oxides are soluble and form acidic solutions.
Vocabulary To Learn
- base: A substance that reacts with an acid to form a compound called a salt.
- soluble: A way of describing a substance that does dissolve in a particular solvent.
- insoluble: A way of describing a substance that does not dissolve in a particular solvent.
- hydroxide: A basic compound which contains an ion comprising of an oxygen and a hydrogen atom (OH⁻).
- neutralisation: A chemical reaction between an acid and base to produce a neutral solution including a salt and water.
Common Mistakes To Avoid
- Pupils often believe that acids 'eat' away at substances, e.g. acid rain and limestone, rather than understanding that this is a chemical reaction.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
A base is a substance that neutralises an acid to make salt and water only (this is a neutralisation reaction). Hydroxides are generally soluble bases (they contain OH⁻ ions).
2. Define this scientific word and use it in context. 'base'
A substance that reacts with an acid to form a compound called a salt. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Pupils often believe that acids 'eat' away at substances, e.g. acid rain and limestone, rather than understanding that this is a chemical reaction. Correction: Using familiar reactions between acids and bases, e.g. hydrochloric acid and sodium hydroxide or calcium carbonate, will provide evidence that a reaction has taken place (i.e. a change in temperature or producing a gas).
More Lessons In This Unit
- Acid-base reactions 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
- 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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