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The point at which chemically equivalent amounts of reactants have reacted.

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Secondary Voltaic Cells

Voltaic cells that can be recharged, original reactanats can be regenerated be reversing the direction of the current flow.

Polar Bond

Covalent bond in which there is an unsymmetrical distribution of electron density.

xylose

A colorless, crystalline pentose sugar, C5H10O5, derived from xylan, straw, corncobs, etc., by treating with heated dilute sulfuric acid, and dehydrating to furfural if stronger acid is used.

Electron Configuration

Specific distribution of electrons in atomic orbitals of atoms or ions.

xanthene dye

Any of a group of dyes having a molecular structure related to that of xanthene in which the aromatic (C6H4) groups are the chromophore.

 

Acid

A substance that produces H+(aq) ions in aqueous solution. Strong acids ionize completely or almost completely in dilute aqueous solution. Weak acids ionize only slightly. Chemicals or substances having the property of an acid are said to be acidic.

Molar Solubility

Number of moles of a solute that dissolve to produce a litre of saturated solution.

Precipitate

An insoluble solid formed by mixing in solution the constituent ions of a slightly soluble solution.

Third Law of Thermodynamics

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

Supercritical Fluid

A substance at temperature above its critical temperature.