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The direct solidification of a vapor by cooling, the reverse of sublimation.

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Fatty Acids

An aliphatic acid, many can obtained from animal fats.

Acidic Salt

A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

Temperature

A measure of the intensity of heat, i.e. the hotness or coldness of a sample. or object.

Radical

An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)

Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Diagonal Similarities

Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.

Saponification

Hydrolysis of esters in the presence of strong soluable bases.

Safranine

Also called "phenosafranine". A purplish-red, water-soluble dye, C18H14N4, used for textiles and as a stain in microscopy.

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Atomic Weight

Weighted average of the masses of the constituent isotopes of an element, The relative masses of atoms of different elements.