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The oxide of a metal that reacts with water to form a base.

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Emulsifying Agent

A sustance that coats the particles of the dispersed phase and prevents coagulation of colloidal particles, an emulsifier.

Chemical Equation

Description of a chemical reaction by placing the formulas of the reactants on the left and the formulas of products on the right of an arrow.

Lewis Acid

Any species that can accept a share in an electron pair.

Mass Number

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

xylan

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

Dissociation Constant

Equilibrium constant that applies to the dissociation of a comples ion into a simple ion and coordinating species (ligands).

Cloud Chamber

A device for observing the paths of speeding particiles as vapor molecules condense on them to form foglike tracks.

Amine

Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.

Crystalline Solid

A solid characterized by a regular, ordered arrangement of particles.

Nitric Acid

HNO3: A strong acid, it is toxic and can cause severe burns. Transparent colorless or yellowish, fuming, suffocating, caustic and corrosive liquid. Nitric acid boiling point is 83C. A 70 percent solution is used in the S.S.E. laboratory for junction depth measurements. Nitric acid is also present in the metal etch solution used for the Aluminum etch procedure.