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Compound produced by dehydration of a carbonic acid. General formula is R--C--O--C--R. Chemical compound that reacts with water to form an acid and are usually oxides of nonmetallic elements.

Anhydrides are generally more reactive than their corresponding acids because they are able to react with water to form their corresponding acid.

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Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Aufbau ('building up') Principle

Describes the order in which electrons fill orbitals in atoms.

Downs Cell

Electrolytic cell for the commercial electrolysis of molten sodium chloride. For further information see Electrochemistry or Fuel Cells.

Supercritical Fluid

A substance at temperature above its critical temperature.

Capillary

A tube having a very small inside diameter.

Group

A vertical column in the periodic table, also called a family.

Ozone

We breathe 24 hours a day, 7 days a week, consuming about 25 kg of air every day. It turns out that we practically predetermine our health by the air we breathe.

Reaction Stoichiometry

Description of the quantitative relationships among substances as they participate in chemical reactions.

Basic Salt

A salt containing an ionizable OH group.

Freezing Point Depression

The decrease in the freezing point of a solvent caused by the presence of a solute.ing Point