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Protection of a metal (making ir a cathode) against corrosion by attaching it to a sacrifical anode of a more easily oxidized metal.

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Optical Activity

The rotation of plane polarized light by one of a pair of optical isomers.

 

Basic Salt

A salt containing an ionizable OH group.

Cation

A positive ion, an atom or group of atoms that has lost one or more electrons.

Stereoisomers

Isomers that differ only in the way that atoms are oriented in space, consist of geometrical and optical isomers.

 

Designated area

An area that may be used for work with carcinogens, reproductive toxins, or substances that have a high degree of acute toxicity. A designated area may be the entire laboratory, an area of a laboratory, or a device such as a laboratory hood.

Electroplating

Plating a metal onto a (cathodic) surface by electrolysis.

History of fireworks

There is an assumption that the history of fireworks started in China, about 2000 years ago. It is possible that the Chinese accidentally discovered explosions by burning bamboo canes.

Amine

Derivatives of ammonia in which one or more hydrogen atoms have been replaced by organic groups.

xylidine

Any of six isomeric compounds that have the formula C8H11N, are derivatives of xylene, and resemble aniline: used in dye manufacture.

Accuracy

How closely a measured value agrees with the correct value.