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Method by which hydrophobic (water-repelling) particles of an ore are separated from hydrophilic (water-attracting) particles of a metallurgical pretreatment process.

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Leclanche Cell

A common type of dry cell.

Intermolecular Forces

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

Electronegativity

A measure of the relative tendency of an atom to attract electrons to itself when chemically combined with another atom.

Reducing Agent

The substance that reduces another substance and is oxidized.

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.

Ideal Gas Law

The product of pressure and the volume of an ideal gas is directly proportional to the number of moles of the gas and the absolute temperature.

Collision Theory

Theory of reaction rates that states that effective collisions between reactant molecules must occur in order for the reaction to occur.

Colloid

A heterogeneous mixture in which solute-like particles do not settle out.

Temperature

A measure of the intensity of heat, i.e. the hotness or coldness of a sample. or object.

Debye

The unit used to express dipole moments.

Colligative Properties

Physical properties of solutions that depend upon the number but not the kind of solute particles present.

Radioactive Dating

Method of dating ancient objects by determining the ratio of amounts of mother and daughter nuclides present in an object and relating the ratio to the object?s age via half-life calculations.

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Aromatic Hydrocarbons

Benzene and its derivatives.

Heterogeneous Mixture

A mixture that does not have uniform composition and properties throughout.

Alums

Hydrated sulfates of the general formula M+M3+(SO4)2.12H2).

Coke

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

Fossil Fuels

Substances consisting largely of hydrocarbons, derived from decay of organic materials under geological conditions of high pressure and temperature (metamorphism) include coal, petroleum, natural gas, peat and oil shale.  For further information see Fuel Chemistry

Base

A substance that produces OH (aq) ions in aqueous solution. Strong soluable bases are soluble in water and are completely dissociated. Weak bases ionize only slightly.

Combination Reaction

Reaction in which two substances (elements or compounds) combine to form one compound.