Types of Chemical Reactions

by Max Newsom

Synthesis Rection

Definition

A chemical reaction in which two or more substances react to form a single substance.

Formula

A+B ---> AB

Examples

1.Sodium metal reacts vigorously with chlorine to create NaCl.

2.Synthesis of Water-2 H2(g) + O2(g) → 2 H2O(g)

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Decomposition Reaction

Definition

A chemical reaction in which a compound breaks down into two or more simple substances.

Formula

AB--->A + B

Examples

1.The compound ammonium nitrate readily decomposes into dinitrogen monoxide and water.

2.When electricity passes through water.

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Single Replacement Reaction

Definition

A chemical creation in which one element takes the place of another element in a compound.

Formula

AB+C ----> AC+B

Examples

1.The hydrogen atoms in HCl are replaced by Zn atoms, and in the process a new element—hydrogen—is formed.

2.Potassium reacts with water in a single replacement reaction that produces hydrogen gas and potassium hydroxide.

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Double Replacement Reaction

Definition

A chemical reaction in which two compounds exchange positive ions and form two new compounds.

Formula

AB+CD ---> AC+BD

Examples

1.KOH + H2SO4 ---> K2SO4 + H2O

2.FeS + HCl ---> FeCl2 + H2S

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Combustion Reaction

Definition

A chemical reaction in which a substance reacts rapidly with O2 often producing heat and light.

Formula

CxHy + O2 ---> CO2 + H2O

Examples

1.CH4 + O2 ---> CO2 + H2O

2.C2H6 + O2 ---> CO2 + H2O

3.C6H12O6 + O2 ---> CO2 + H2O

4.C2H5OH + O2 ---> CO2 + H2O

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