In a chemical equation, the original species at the left side of arrow are called reactants and the species formed as a result of the reaction written at the right side of arrow called as products.

A process in which one set of chemicals is mixed and transformed into a new set of chemicals.

Written between the symbols and/or formulas of reactants or products

Left side- read as "combine with" or "reacts with" right side- read as "and' or "plus"

Means "yields" or "produce"; separates reactants from products.

Use for reversible reactions in place of a single arrow.

Indicates a gaseous reactant or product.

Indicates a solid reactant or product.

Indicates a liquid reactant or product.

Indicates an aqueous solution (dissolved in water)  reactant or product .

Indicates that heat must be supplied to reactants before a reaction occurs.

The substance written above the arrow is a catalyst; may also indicate the solvent.

The substance written above the arrow is a catalyst; may also indicate the solvent.

Balancing chemical equation is absolutely essential if you want to determine the quantities of reactants or products.

Balanced chemical equation gives only the identity of the beginning reactants and the final products using the appropriate formulas, as well as the temperature, physical state, and pressure conditions under which the reaction is to operate.

Quantities involved are not indicated until the equation has been balanced.

A balanced equation assures that the law of ? of mass is obeyed.

These are whole numbers in front of the symbols or chemical formulas.

The subscript of a compound are fixed; thus they can be changed to balanced an equation.

The coefficients used should be at the smallest whole numbers possible.

It multiplies every number in the formula.

Elements H, Br, F, Cl, I, O, and N, if they exists in free element or uncombined state as diatomic molecule write a subscript of 2.

A type of reaction of two or more elements or compounds to form a single product.

A + B → AB

This type of reaction is the reverse of synthesis or combination reaction.  The compound broke into elements or into simpler compounds. Many of these reactions take place only when heat is applied.

AB → A + B

The reaction in which a free element replaced another element in a compound.

AB + C → AC + B

This reaction occurs when two ionic compounds exchange cations (positive) and anion (negative) with each other.

AB + CD → AD + CB

It is a reaction in which a substance reacts with oxygen gas (O2), releasing energy in the form of light and heat. Oxygen must be present for a combustion reaction to take place.

It is a reaction in which a substance reacts with oxygen gas (O2), releasing energy in the form of light and heat. Oxygen must be present for this reaction to take place.

CxHx + O2 → CO2 + H2O