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
Examples
2.Synthesis of Water-2 H2(g) + O2(g) → 2 H2O(g)
Decomposition Reaction
Definition
A chemical reaction in which a compound breaks down into two or more simple substances.
Formula
Examples
2.When electricity passes through water.
Single Replacement Reaction
Definition
A chemical creation in which one element takes the place of another element in a compound.
Formula
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.
Double Replacement Reaction
Definition
A chemical reaction in which two compounds exchange positive ions and form two new compounds.
Formula
Examples
1.KOH + H2SO4 ---> K2SO4 + H2O
2.FeS + HCl ---> FeCl2 + H2S
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