Year 10 - Science
Solubility rules
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 remember, and apply, the solubility rules to know whether a salt formed is soluble or insoluble.
Key Notes
- There are a list of general rules which describe the solubility of common types of substances in water.
- Reactions that form insoluble products are called precipitation reactions; the solids formed are called the precipitate.
- When two soluble salts are mixed together, sometimes they will rearrange to create an insoluble salt.
- Solubility rules can be used to identify which two solutions are needed to mix in order to create an insoluble salt.
Vocabulary To Learn
- solubility: The ability of a substance to dissolve in a particular solvent creating a solution; how well a solute dissolves in a solvent.
- salt: An ionic compound, usually formed by neutralisation of an acid by a base.
- soluble: When a substance dissolves in a liquid, it is described as soluble in that liquid.
- precipitate: An insoluble solid formed when two solutions react together.
- insoluble: When a substance does not dissolve in a liquid, it is described as insoluble in that liquid.
Common Mistakes To Avoid
- All salts are either completely soluble or completely insoluble in water.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
There are a list of general rules which describe the solubility of common types of substances in water. Reactions that form insoluble products are called precipitation reactions; the solids formed are called the precipitate.
2. Define this scientific word and use it in context. 'solubility'
The ability of a substance to dissolve in a particular solvent creating a solution; how well a solute dissolves in a solvent. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: All salts are either completely soluble or completely insoluble in water. Correction: Not all salts follow a strict 'soluble' or 'insoluble' rule. Some salts have limited solubility, meaning they dissolve only to a certain extent. Solubility rules help us predict the solubility of common salts, but there are always exceptions.
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
- Making a pure dry sample of a soluble salt Study Guide
- pH scale and indicators 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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