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The percent of a specified compound or element in an impure sample.

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Coke

An impure form of carbon obtained by destructive distillation of coal or petroleum.

Anode

In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.

Electrolysis

Process that occurs in electrolytic cells.

Dipole Moment

The product of the distance separating opposite charges of equal magnitude of the charge, a measure of the polarity of a bond or molecule, a measured dipole moment refers to the dipole moment of an entire molecule.

Coordination Sphere

The metal ion and its coordinating ligands but not any uncoordinated counter-ions.

Corrosion

Oxidation of metals in the presence of air and moisture.

Gel

Colloidal suspension of a solid dispersed in a liquid, a semirigid solid.

Dumas Method

A method used to determine the molecular weights of volatile liquids.

Mass Number

The sum of the numbers of protons and neutrons in an atom, an integer.

Zone Refining

A method of purifying a bar of metal by passing it through an induction heater, this causes impurties to move along a melted portion. This method applies the fact when a metal crystallizes on cooling, impurities are automatically expelled as they do not form part of the crystal.