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H3P04, Colorless liquid or rhombic crystals, decomposes before it will boil. Used mostly in the metal etchant. Used in cleaning operations to remove encrusted surface matter and mineral scale found on metal equipment such as boilers and steam producing equipment. Also used to brighten metals and remove rust.

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Raoult's Law

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

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Third Law of Thermodynamics

The entropy of a hypothetical pure, perfect, crystalline sustance at absolute zero temperature is zero.

Integrated Rate Equation

An equation giving the concentration of a reactant remaining after a specified time, has different mathematical form for different orders of reactants.

Critical Pressure

The pressure required to liquefy a gas (vapor) at its critical temperature.

Exothermicity

The release of heat by a system as a process occurs.

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Chemical Kinetics

The study of rates and mechanisms of chemical reactions and of the factors on which they depend.

Mother Nuclide

Nuclide that undergoes nuclear decay.