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A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.

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Method of Initial Rates

Method of determining the rate-law expression by carrying out a reaction with different initial concentrations and analyzing the resultant changes in initial rates.

Hydrometer

A device used to measure the densities of liquids and solutions.

yttrium metal

Any of a subgroup of rare-earth elements, of which the cerium and terbium metals comprise the other two subgroups.

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

Density

Density is the ratio b/w Mass and Volume: D=M/V

Free Radical

A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.

Donor Atom

A ligand atom whose electrons are shared with a Lewis acid.

Oxidation-reduction Reactions

Reactions in which oxidation and reduction occur, also called redox reactions.

Safranine

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

Saccharate

A compound formed by interaction of sucrose with a metallic oxide, usually lime, and useful in the purification of sugar.