Chemical ChangesExam Tips

Exam Tips for Making Salts

Part of Making Salts · GCSE GCSE Chemistry revision

This exam tips covers Exam Tips for Making Salts within Making Salts for GCSE Chemistry. Revise Making Salts in Chemical Changes for GCSE Chemistry with 20 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 12 of 13 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.

Topic position

Section 12 of 13

Practice

20 questions

Recall

20 flashcards

💡 Exam Tips for Making Salts

🎯 Common Question Types:

Describe the full method for making a named salt (4-6 marks)
Explain the purpose of each step in the method (1-2 marks each)
Identify whether a salt is soluble or insoluble and choose the correct method (1-2 marks)
Write the equation for a precipitation reaction (2-3 marks)
State solubility rules for specific ions (1 mark)

📝 Key Command Words:

Describe the method: All steps in order — include equipment, quantities, safety where relevant
Explain: Give a scientific reason for each step
Suggest: Use solubility rules to predict what precipitate forms
Write the equation: Include state symbols (aq), (s), (l), (g)

⚠️ Common Mistakes to Avoid:

Boiling all the water off — only evaporate to concentrate, then let crystals form on cooling
Adding excess acid instead of excess base — always add excess of the insoluble reactant
Forgetting to wash the precipitate with distilled water to remove impurities
Saying silver chloride is soluble — it is an insoluble white precipitate
Not including state symbols in ionic precipitation equations

Keep building this topic

Read this section alongside the surrounding pages in Making Salts. That gives you the full topic sequence instead of a single isolated revision point.

Exam Focus Knowledge Organiser: Making Salts The Art of Crystal Growing Three Methods of Making Salts

Practice Questions for Making Salts

Which of the following is the correct method for making copper sulfate crystals from copper oxide and sulfuric acid?

A. Add excess copper oxide to acid, filter off unreacted solid, then evaporate to crystallise
B. Add excess acid to copper oxide, then boil to dryness
C. Use titration with an indicator to find the exact volumes, then repeat
D. Mix equal volumes of copper sulfate solution and sulfuric acid

1 markfoundation

Describe the steps involved in the required practical for preparing a pure, dry sample of copper sulfate crystals from copper oxide and dilute sulfuric acid.

4 marksstandard

Quick Recall Flashcards

What colour is copper sulfate?

Blue (as crystals and in solution)

What is crystallisation?

The process of forming solid crystals from a saturated solution

20 questions on Making Salts — practise free

Instant marking, adaptive difficulty, and 20 spaced repetition flashcards. Free until your GCSEs.

Try PrepWise Free

Exam Focus

Knowledge Organiser: Making Salts