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

 

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Endothermic

Describes processes that absorb heat energy.

Semipermable Membrane

A thin partition between two solutions through which certain molecules can pass but others cannot.

Electrolyte

A substance whose aqueous solutions conduct electricity.

 

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Particulate Matter

Fine divided solid particles suspended in polluted air.

Rate of Reaction

Change in the concentration of a reactant or product per unit time.

Lewis Base

Any species that can make available a share in an electron pair.

Coordination Compound or Complex

A compound containing coordinate covalent bonds.

Saccharic

of or derived from saccharin or a saccharine substance.

 

Flux

A substance added to react with the charge, or a product of its reduction, in metallurgy, usually added to lower a melting point.