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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.

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Dispersing Medium

The solvent-like phase in a colloid.

Electromotive Series

The relative order of tendencies for elements and their simple ions to act as oxidizing or reducing agents, also called the activity series.

Inhibitory Catalyst

An inhibitor, a catalyst that decreases the rate of reaction.

Curie (Ci)

The basic unit used to describe the intensity of radioactivity in a sample of material. One curie equals 37 billion disintegrations per second or approximately the amount of radioactivty given off by 1 gram of radium.

Intermolecular Forces

Forces between individual particles (atoms, molecules, ions) of a substance.

High Spin Complex

Crystal field designation for an outer orbital complex, all t2g and eg orbitals are singly occupied before any pairing occurs.

Freezing Point Depression

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

Octane Number

A number that indicates how smoothly a gasoline burns.

Standard Electrodes

Half-cells in which the oxidized and reduced forms of a species are present at unit activity, 1.0M solutions of dissolved ions, 1.0atm partial pressure of gases, and pure solids and liquids.

Cis-Trans Isomerism

A type of geometrical isomerism related to the angles between like ligands.