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Any of six colorless, crystalline, isomeric acids having the formula C9H10O2, derived from xylene.

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Spectrochemical Series

Arrangement of ligands in order of increasing ligand field strength.

Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Chemistry of the sky

Chemistry can teach us about the composition of celestial bodies and determine their age.

K Capture

Absorption of a K shell (n=1) electron by a proton as it is converted to a neutron.

Neutralization

The reaction of an acid with a base to form a salt and water. Usually, the reaction of hydrogen ions with hydrogen ions to form water molecules.

Forbidden Zone

A relatively large energy separation between an insulator's highest filled electron energy band and the next higher energy vacant band. Beginning in the fourth energy level, a set of seven degenerate orbitals per energy level, higher in energy than s, p, and d orbitals of the same energy level.

Partial Pressure

The pressure exerted by one gas in a mixture of gases.

Raoult's Law

The vapor pressure of a solvent in an ideal solution decreases as its mole fraction decreases.

Mass Action Expression

For a reversible reaction, aA + bB cC + dD the product of the concentrations of the products (species on the right), each raised to the power that corresponds to its coefficient in the balanced chemical equation, divided by the product of the concentrations of reactants (species on the left), each raised to the power that corresponds to its coefficient in the balanced chemical equation. At equilibrium the mass action expression is equal to K, at other times it is Q.[C]c[D]d [A]a[B]b = Q, or at equilibrium K.

PseudobinaryIonic Compounds

Compounds that contain more than two elements but are named like binary compounds.