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Any of three oily, colorless, water-insoluble, flammable, toxic, isomeric liquids, C8H10, of the benzene series, obtained mostly from coal tar: used chiefly in the manufacture of dyes.

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Polyprotic Acid

An Acid that can form two or more hydronium ions per molecule, often a least one step of ionization is weak.

Electrolyte

A substance whose aqueous solutions conduct electricity.

 

Vapor Pressure

The particle pressure of a vapor at the surface of its parent liquid.

Rate of Reaction

Change in the concentration of a reactant or product per unit time.

Ground State

The lowest energy state or most stable state of an atom, molecule or ion.

Condensed States

The solid and liquid states.

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.

Bond Order

Half the numbers of electrons in bonding orbitals minus half the number of electrons in antibonding orbitals. Bond order gives an indication to the stability of a bond. Also defined as the difference between the number of bonding electrons and antibonding electrons divided by two.

Critical Mass

The minimum mass of a particular fissionable nuclide in a given volume required to sustain a nuclear chain reaction.