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Equilibrium constant for the ionization of water, Kw = [H3O+][OH-] =1.00 x 10-14 at 25 °C.

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Ligand

A Lewis base in a coordination compound.

Unsaturated Hydrocarbons

Hydrocarbons that contain double or triple carbon-carbon bonds.

Coke

An impure form of carbon obtained by destructive distillation of coal or petroleum.

Geometrical Isomers

Compounds with different arrangements of groups on either side of a bond with restricted rotation, such as a double bond or a single bond in a ring, for example cis-trans isomers of certain alkenes. Stereoisomers that are not mirror images of each other, also known as position isomers.

Periodicity

Regular periodic variations of properties of elements with atomic number (and position in the periodic table).

Equation of State

An equation that describes the behavior of matter in a given state, the van der Waals equation describes the behavior of the gaseous state.

yttria

Y2O3: A white, water-insoluble powder, Y2O3, used chiefly in incandescent gas and acetylene mantles.

Electrode Potentials

Potentials, E, of half-reactions as reductions versus the standard hydrogen electrode.

Differential Thermometer

A thermometer used for accurate measurement of very small changes in temperature.

Percent Composition

The mass percent of each element in a compound.