Types of Chemical Reactions

by Jared Thomas (5)


A synthesis reaction is a reaction in which two or more substances react to form a single substance. The reactants may be either elements or compounds.

Equation: A + B ---> AB

Examples: sodium chloride, h2o

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A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances.

Equation: AB -----> A + B

Examples: cement

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A single-replacement reaction is a reaction in which one element takes the place of another element in a compound.

Equation: A + BC -----> B + AC

Example: potassium reacting with water

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A double-replacement reaction is one in which two different compounds exchange positive ions and form two new compounds.

Equation: AB + CD -----> AD + CB

Example: potassium iodide mixed with lead(II) nitrate

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A combustion reaction is one in which a substance reacts rapidly with oxygen, often producing heat and light.

Equation: CH + 2O -----> CO + 2H O

4 2 2 2

Example: burning of natural gas

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