Types of Chemical Reactions

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• Types:

  • Synthesis (combination)
  • Decomposition
  • Single Displacement
  • Double displacement
  • Neutralisation (Acid/base)
  • Combustion

• Chemical change: any change in which a new substance is formed

  • Release of energy as heat/light
  • Change in colour
  • Odour

1. Neutralisation
   • Acid(H) + Base(OH) → salt + H(OH)
2. Combustion
   • AB + oxygen → CO2 + H2O
3. Synthesis
   • A + B → AB
4. Decomposition
   • AB → A + B
5. Single Displacement
   • AB + C → AC + B
6. Double displacement
   • AB + CD → AC + BD

IMPORTANT NOTE

Please don’t use “Single displacement” or “Double Displacement” past year 9. In year 10, you’ll learn a new set of reactions called “Redox Reactions”