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Synthesis Reactions

Synthesis or Direct Combination Reactions

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What Is a Synthesis Reaction?

A synthesis reaction or direct combination reaction is a type of chemical reaction in which two or more simple substances combine to form a more complex product. The reactants may be elements or compounds. The product is always a compound.

General Form of a Synthesis Reaction

The general form of a synthesis reaction is:

A + B → AB

Examples of Synthesis Reactions

These are some examples of synthesis reactions:
  • Synthesis of Water
    2 H2(g) + O2(g) → 2 H2O(g)

  • Synthesis of Carbon Dioxide
    2 CO(g) + O2(g) → 2CO2(g)

  • Synthesis of Ammonia
    3 H2(g) + N2(g) → 2 NH3(g)

  • Synthesis of Aluminum Oxide
    4 Al(s) + 3 O2(g) → 2 Al2O3(s)

  • Synthesis of Iron Sulfide
    8 Fe + S8 → 8 FeS

  • Synthesis of Potassium Chloride
    2 K(s) + Cl2(g) → 2 KCl(s)

More About Types of Reactions

Classifying Chemical Reactions
Video: What Are the Types of Chemical Reactions?
Chemical Reactions Quiz
Types of Inorganic Chemical Reactions

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