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An Acid that can form two or more hydronium ions per molecule, often a least one step of ionization is weak.

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Cis-

The prefix used to indicate that groups are located on the same side of a bon about which rotation is restricted.

Enthalpy

The heat content of a specific amount of substance, defined as E= PV.

Electrode Potentials

Potentials, E, of half-reactions as reductions versus the standard hydrogen electrode.

Dextrorotatory

Refers to an optically active substance that rotates the plane of plane polarized light clockwise, also called dextro.

Monoprotic Acid

Acid that can form only one hydronium ion per molecule, may be strong or weak. Acid that contains one ionizable hydrogen atom per formula unit.

Critical Point

The combination of critical temperature and critical pressure of a substance.

Electromotive Series

The relative order of tendencies for elements and their simple ions to act as oxidizing or reducing agents, also called the activity series.

Thermonuclear Energy

The energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity. In these processes a small amount of mass is converted to energy according to the relationship E = mc2, where E is energy, m is mass, and c is the speed of light.

Conjugate Acid-base Pair

In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.

Flux

A substance added to react with the charge, or a product of its reduction, in metallurgy, usually added to lower a melting point.