CHEMICAL REACTION AND BALANCING EQUATIONS

Chemical Reactions

Processes where substances, known as reactants, are transformed into different substances, known as products.

These reactions involve the breaking and forming of chemical bonds and can be represented by chemical equations.

Reactants

Substances that undergo the reaction.

Products

New substances formed as a result of the reaction.

Chemical Equation

Chemical Equation:

A symbolic representation of a chemical reaction.

For example:

CH4+2O2→CO2+2H2O

Catalysts

Substances that increase the rate of reaction without being consumed.

Energy changes

Reactions can absorb (endothermic) or release (exothermic) energy.

Synthesis Reaction

Decomposition Reaction

Single Displacement Reaction(substitution)

Double Displacement Reaction(metathesis)

Combustion Reaction

5 Ttpes of Chemical Reactions

Sysnthesis Reaction

Two or more reactants combine to form a

single product.

A+B→AB

Decomposition Reaction

A single compound breaks down into two or more simple substances.

AB→A+B

Single Displacement Reaction (substitution)

One element replaces another in a compound.

A+BC→AC+B

Double Displacement Reaction(Metathesis)

Exchange of ions between two compounds.

AB+CD→AD+CB

Combustion Reaction

A substance reacts with oxygen, often producing heat and light.

Balancing Equations

Is essential because it ensures that the same number of atoms of each element are present on both sides of the equation, in accordance with the law of conservation of mass.