Chemical ChangesKey Facts

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Part of Displacement Reactions — GCSE Chemistry

This key facts covers More Key Facts within Displacement Reactions for GCSE Chemistry. Revise Displacement Reactions in Chemical Changes for GCSE Chemistry with 20 exam-style questions and 20 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 7 of 12 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 7 of 12

Practice

20 questions

Recall

20 flashcards

📌 More Key Facts

Thermit reaction: 2Al + Fe₂O₃ → Al₂O₃ + 2Fe (reaches 2500°C — used to weld railway tracks!)
Halogen reactivity: F₂ > Cl₂ > Br₂ > I₂ (more reactive halogen displaces less reactive)
Colour changes: CuSO₄ solution is blue, Cu metal is brown/pink; FeSO₄ is pale green

Keep building this topic

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

Exothermic vs Endothermic Energy Diagrams Common Misconceptions The Chemistry of Bullying Electron Transfer — What's Really Happening

Practice Questions for Displacement Reactions

Which statement correctly describes a displacement reaction?

A. A less reactive metal replaces a more reactive metal from its salt solution
B. A more reactive metal replaces a less reactive metal from its salt solution
C. Two metals both dissolve when placed in the same acid
D. A metal oxide breaks down when heated strongly

1 markfoundation

In the reaction between zinc and copper sulfate solution, explain which species is oxidised and which is reduced. Include half equations in your answer. [3 marks]

3 marksstandard

Quick Recall Flashcards

What colour is bromine?

Orange/brown

What does OIL RIG stand for?

Oxidation Is Loss (of electrons), Reduction Is Gain (of electrons)

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Exothermic vs Endothermic Energy Diagrams

Common Misconceptions