Chemical Compound


A compound is a substance formed when two or more chemical elements are chemically bonded together. In mixtures, the substances present are not chemically bonded together

Water: two hydrogen atoms bonded to an oxygen atom.

The type of bonds holding elements together in a compound can vary: two common types are covalent bonds and ionic bonds.

The elements in any compound are always present in fixed ratios.

Example 1: Pure water is a compound made of two elements - hydrogen and oxygen. The ratio of hydrogen to oxygen in water is always 2:1. Each molecule of water contains two hydrogen atoms bonded to a single oxygen atom.

Compounds can be decomposed chemically into their constituent elements.

Important Chemical Compounds, their Formulae and Uses

Name of Important Chemical Compound, their Chemical formula and its uses are given below:

  1. Calcium Carbonate

Formula: CaCO3

Uses: Non-prescription drug for relief from acid indigestion and heartburn. Also considered a calcium supplement.

  1. Sodium Chloride

Formula: NaCl

Uses: Used to season food (during food preparation and at the table), also used in the past as a method of food preservation.

  1. Methane

Formula: CH4

Uses: Natural gas, fuel (also called Marsh Gas)

  1. Aspirin

Formula: C9H8O4

Uses: Pain Reliever

  1. Potassium Tartrate

Formula: K2C4H4O6

Uses: Cream of tartar, cooking

  1. Baking soda

Formula: NaHCO3

Uses: Cooking

  1. Acetaminophen

Formula: C8H9NO2

Uses: Pain Reliever

  1. Acetic Acid

Formula: C2H4O2

Uses: Active ingredient in vinegar

  1. Caffeine

Formula: C8H10N4O2

Uses: Stimulant in coffee, tea, some soda

  1. Propane

Formula: C3H8

Uses: Fuel for cooking

  1. Sodium Carbonate

Formula: Na2CO3

Uses: washing soda

12.Phosphoric Acid

Formula: H3PO4

Uses: flavouring in soda

  1. Ascorbic acid

Formula: C6H8O6

Uses: Essential vitamin (vitamin C)

  1. Ammonia

Formula: NH3

Uses: Fertilizer, household cleaner when dissolved in water

  1. Ethylene Glycol

Formula: C2H6O2

Uses: Antifreeze

  1. Calcium Carbonate

Formula: CaCO3

Uses: Antacid

  1. Ethanol

Formula: C2H5OH

Uses: Disinfectant, alcoholic beverages

18.Carbon dioxide

Formula: CO2

Uses: Carbonating agent in soda

  1. Hydrochloric Acid

Formula: HCl

Uses: Production of batteries, photoflash bulbs and fireworks. It's even used to process sugar and make gelatin.

  1. Calcium Oxide

Formula: CaO

Uses: Less common in modern homes than in the past. Glows when heated; was used in theatres before the invention of electric lighting. Health risks of skin contact or inhalation.

  1. Sucrose

Formula: C12H22O11

Uses: Used in cooking. Use as a sweetener.

  1. Potassium Carbonate

Formula: K2CO3

Uses: Potash is the common name for various mined and manufactured salts that contain potassium in water-soluble form.

  1. Plaster of Paris

Formula: 2CaSO4·½H2O

Uses: Used for casts to hold broken limbs in place, modelling casts, sculptures and in plasterboard walls and ceilings

  1. Gypsum

Formula: CaSO4.2H2O

Uses: Use to manufacture dry wall, plaster, joint compound.

  1. Sodium Bicarbonate

Formula: NaHCO3

Uses: Used in baking where it reacts with other ingredients, releasing carbon dioxide (CO2), helping dough rise.

  1. Sulphuric Acid

Formula: H2SO4

Uses: Used in lead-acid batteries for cars and other vehicles. It is also known as Vitriol.

  1. Hydrogen Peroxide

Formula: H2O2

Uses: Used as a mouth wash (Personal Hygiene).

Chemical formula of Psuedo Alum - K2SO4.Al2(SO4)3.24H2O
Aqua Regia is a mixture of - HCl and HNO3 . In aqua-regia,3 parts of HCl and 1 part of HNO3 are mixed.