- Copper sulfate hydration: CuSO₄·5H₂O(s) ⇌ CuSO₄(s) + 5H₂O(g)
- Ammonium chloride decomposition: NH₄Cl(s) ⇌ NH₃(g) + HCl(g)
- Haber process: N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
- Thermal decomposition of limestone: CaCO₃(s) ⇌ CaO(s) + CO₂(g)
The copper sulfate hydration test is the classic example:
- Anhydrous CuSO₄ is white
- Hydrated CuSO₄·5H₂O is blue
- Adding water to white powder → turns blue + gets warm (exothermic)
- Heating blue crystals → turns white + steam released (endothermic)
- This test is used to detect the presence of water
This deep dive covers Examples of Reversible Reactions within Reversible Reactions for GCSE Chemistry. Revise Reversible Reactions in Rates of Reaction for GCSE Chemistry with 20 exam-style questions and 12 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 6 of 12 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Reversible Reactions
What does the symbol ⇌ mean when used in a chemical equation?
Explain the relationship between the energy changes in the forward and reverse reactions of a reversible reaction.
Quick recall flashcards
What symbol shows a reaction is reversible?
⇌ (double arrow)
What is a reversible reaction?
A reaction where products can react together to reform the original reactants