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A sample of matter composed of two or more substances, each of which retains its identity and properties.

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Leclanche Cell

A common type of dry cell.

Electroplating

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

Differential Thermal Analysis (DTA)

A technique for observing the temperature, direction, and magnitude of thermally induced transitions in a material by heating/cooling a sample and comparing its temperature with that of an inert reference material under similar conditions.

Primary Voltaic Cells

Voltaic cells that cannot be recharged, no further chemical reaction is possible once the reactants are consumed.

Electrolysis

Process that occurs in electrolytic cells.

Dissociation

In aqueous solution, the process in which a solid ionic compound separates into its ions.

Saturated Solution

Solution in which no more solute will dissolve.

Acid Anhydride

Compound produced by dehydration of a carbonic acid. General formula is R--C--O--C--R. Chemical compound that reacts with water to form an acid and are usually oxides of nonmetallic elements.

Free Radical

A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.

Isomers

Different substances that have the same formula.