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Concentration expressed as number of moles of solute per kilogram of solvent.

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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.

Net Ionic Equation

Equation that results from canceling spectator ions and eliminating brackets from a total ionic equation.

Displacement Reactions

Reactions in which one element displaces another from a compound.

 

xylan

The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.

Oxidation

An algebraic increase in the oxidation number, may correspond to a loss of electrons.

Heterogeneous Catalyst

A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.

Metallurgy

Refers to the overall processes by which metals are extracted from ores.

Cathode

Electrode at which reduction occurs in a cathode ray tube, the negative electrode.

Dispersing Medium

The solvent-like phase in a colloid.

Active Metal

Metal with low ionization energy that loses electrons readily to form cations.