Types of chemical Reactions

by:Reilly Weakley

Synthesis

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

Equation: A + B --> AB

Ex. 2Na + Cl2 --> 2NaCl

Decomposition

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

Equation: AB --> A + B

Ex. 2H2O --> 2H2 + O2

Single-replacement

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

Equation: A + BC --> B + AC

Ex. Cu + 2AgNO3 --> 2Ag + Cu(NO3)2

Double-replacement

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

Equation: AB + CD --> AD + CB

Ex. Pb(NO3)2 + 2KI --> PbI2 + 2KNO3

Combustion

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

Equation: 2H2 + O2 --> 2H2O

Ex. CH4 + 2O2 --> CO2 + 2H2O