types of chemical reaction

TYPES OF

CHEMICAL REACTION

PRESENTED BY : LEA S. PAMINTUAN

Five Types of Chemical Reactions

Synthesis Decomposition Single Replacement Double Replacement Combustion

SYNTHESIS- The word Synthesis means to

put things together to make a whole.

- In a Synthesis reaction two or more chemicals bond together forming one new substance.

SYNTHESIS

THE GET-TOGETHER REACTANT + REACTANT →

PRODUCT

A + B AB

→

SYNTHESIS

Synthesis reactions are easy to recognize. There will be two or more reactants, but only one product.

Example : 2Na + Cl2 → 2NaCl 2H2 + O2 → 2H2O

DECOMPOSITION

• The word Decomposition means to separate or breakdown into smaller pieces.

• In a Decomposition reaction, one substance breaks down into two or more products.

DECOMPOSITION

THE BREAK-UP REACTANT → PRODUCT +

PRODUCT

AB A + B

→

DECOMPOSITION

Decomposition reactions , look for chemical equations which have only one reactant, but two or more product.

Example :

SINGLE REPLACEMENT

•Single replacement reaction, one element replaces another element in a compound.

SINGLE REPLACEMENTTHE CHEATERREACTANT + REACTANT → PRODUCT

+ PRODUCT

AB + X AX + B

→

SINGLE REPLACEMENT• Single replacement reactions

have an element and a compound on both the reactant and product side of the equation.

Zn+2HCl →ZnCl2+H2

DOUBLE REPLACEMENT

•Double replacement reaction, a compound reacts with another compound to form two new compounds.

DOUBLE REPLACEMENTTHE SWAP REACTANT+REACTANT

→PRODUCT+PRODUCT

AB + XY AX + BY

→

DOUBLE REPLACEMENT

• Double replacement reactions have two compounds on both the reactant and product side of the equation.

AgNO3+NaCl→AgCl+NaNO3

COMBUSTION•Combustion, or burning,

is a chemical reaction between an organic compound ( usually a hydrocarbon) and oxygen gas.

• The products in a combustion reaction are carbon dioxide and water.

.

• Combustion reactions are exothermic, meaning that they produce heat.

• The general formula for a combustion reaction is :

CxHX + O2→CO2+H2O

.

• Combustion reactions always have oxygen gas as a reactant and water and carbon dioxide as product.