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Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

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Actual Yield

Amount of a specified pure product actually obtained from a given reaction. Compare with Theoretical Yield.

Dynamic Equilibrium

An equilibrium in which processes occur continuously, with no net change. When two (or more) processes occur at the same rate so that no net change occurs.

Combination Reaction

Reaction in which two substances (elements or compounds) combine to form one compound.

Coulometry

The quantitative application of Faraday's Law to the analysis of materials. The current and time are the usual variables measured.

Oxidizing Agent

The substance that oxidizes another substance and is reduced.

Lone Pair

Pair of electrons residing on one atom and not shared by other atoms, unshared pair.

Explosive

A chemical or compound that causes a sudden, almost instantaneous release or pressure, gas, heat and light when subjected to sudden shock, pressure, high temperature or applied potential.

Colloid

A heterogeneous mixture in which solute-like particles do not settle out.

Crystal Lattice

A pattern of arrangement of particles in a crystal.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.