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There are six main types of reactions

Learn about synthesis, decomposition, combustion, single replacement, double replacement, and neutralization reactions with examples and explanations.

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There are six main types of reactions

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  1. There are six main types of reactions • Synthesis • Decomposition • Combustion • Single Replacement (Single Displacement) • Double Replacement (Double Replacement) • Neutralization

  2. Synthesis • A combination of two or more substances to form a larger substance. • A + B  AB • Examples: • Hydrogen + Oxygen  Water • Sodium + Chlorine  Sodium Chloride

  3. Decomposition • The breaking apart of one substance into two or more parts. • AB A + B • Examples: • WaterHydrogen + Oxygen • Calcium carbonate  calcium oxide + carbon dioxide

  4. Combustion • A special form of decomposition which involves a reaction between a hydrocarbon (has C and H) and oxygen to form carbon dioxide and water vapor. • Example: • Methane + oxygen  carbon dioxide + water

  5. Single Replacement or Single Displacement • An element in a compound is replaced by a free element. • A + BC  AC + B • Examples: • Potassium + water  potassium hydroxide + hydrogen • Lead (II) sulfide + iron  iron (II) sulfide + lead

  6. Double Replacement or Double Displacement • Two elements switch places with each other. • AB + CD  AD + CB • Examples: • Zinc chloride + sodium bromide  zinc bromide + sodium chloride • copper (II) sulfate + silver nitrate  silver sulfate + copper (II) nitrate

  7. Neutralization • A special form of double replacement in which an acid and a base form salt and water. • Examples: • Hydrochloric acid + sodium hydroxide  sodium chloride + water • phosphoric acid + calcium hydroxide  calcium phosphate + water

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