chem

Chemical Reaction

A process in which one or more substances (reactants) are converted into one or more new substances (products).

Indicators of a Chemical Reaction

Changes that suggest a chemical reaction has occurred, including change in state, colour change, gas evolution, temperature change, and formation of precipitate.

Balanced Chemical Equation

An equation that follows the Law of Conservation of Mass, where the number of atoms of each element is the same on both sides.

Combination Reaction

A type of chemical reaction where two or more substances combine to form one product.

Decomposition Reaction

A type of chemical reaction in which one substance breaks down into two or more substances.

Displacement Reaction

A reaction in which a more reactive element displaces a less reactive one from a compound.

Double Displacement Reaction

A reaction where two compounds exchange ions.

Redox Reaction

A chemical reaction in which oxidation and reduction occur simultaneously.

Oxidation

The gain of oxygen or loss of hydrogen during a chemical reaction.

Reduction

The loss of oxygen or gain of hydrogen during a chemical reaction.

Corrosion

The reaction of a metal with air and moisture, often forming an oxide layer.

Rancidity

The process of food spoiling due to the oxidation of fats or oils.

Symbols Used in Chemical Equations

Abbreviations such as (s) for solid, (l) for liquid, (g) for gas, and (aq) for aqueous solutions.

Thermal Decomposition

A decomposition reaction that requires heat.

Photodecomposition

A decomposition reaction that requires light.

Electrolytic Decomposition

A decomposition reaction that requires electricity.