Types of Chemical Reactions

Front

What is a synthesis (combination) reaction?

Back

A reaction where two or more reactants combine to form a single product. Example: 2H₂ + O₂ → 2H₂O.

Front

What is a decomposition reaction?

Back

A reaction where a single compound breaks down into two or more products. Example: 2H₂O → 2H₂ + O₂.

Front

What is a combustion reaction?

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A reaction that involves oxygen and produces heat and light, typically involving a hydrocarbon and oxygen. Example: CH₄ + 2O₂ → CO₂ + 2H₂O.

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What is a single replacement reaction?

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A reaction where one element replaces another in a compound. Example: Zn + CuSO₄ → ZnSO₄ + Cu.

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What is a double replacement reaction?

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A reaction where the anions and cations of two different compounds switch places, forming two new compounds. Example: AgNO₃ + NaCl → AgCl + NaNO₃.

Front

What are the general characteristics of combustion reactions?

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They always involve oxygen and produce heat and light, typically resulting in carbon dioxide and water as products.

Front

What is the general form of a synthesis reaction?

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A + B → AB, where A and B are reactants that combine to form product AB.

Front

What is the general form of a decomposition reaction?

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AB → A + B, where a single compound AB breaks down into its components A and B.

Front

What is the role of oxygen in combustion reactions?

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Oxygen acts as a reactant that combines with a fuel (like hydrocarbons) to produce energy, carbon dioxide, and water.

Front

What is an example of a synthesis reaction involving metals?

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2Mg + O₂ → 2MgO, where magnesium and oxygen combine to form magnesium oxide.