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Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.

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Homogeneous Catalyst

A catalyst that exists in the same phase (solid, liquid or gas) as the reactants. The process is called Homogeneous Catalysis.

Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Atomic Orbital

Region or volume in space in which the probability of finding electrons is highest.

Basic Anhydride

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

Dissociation

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

Le Chatelier's Principle

States that a system at equilibrium, or striving to attain equilibrium, responds in such a way as to counteract any stress placed upon it.
If a stress (change of conditions) is applied to a system at equilibrium, the system shifts in the direction that reduces stress.

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Nitrogen Cycle

The complex series of reactions by which nitrogen is slowly but continually recycled in the atmosphere, lithosphere and hydrosphere.

 

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.

Amorphous Solid

A noncrystalline solid with no well-defined ordered structure.