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A substance that conducts electricity well in a dilute aqueous solution.

 

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Ideal Solution

A solution that obeys Raoult's Law exactly.

Optical Activity

The rotation of plane polarized light by one of a pair of optical isomers.

 

Rate-law Expression

Equation relating the rate of a reaction to the concentrations of the reactants and the specific rate of the constant.

Substance

Any kind of matter all specimens of which have the same chemical composition and physical properties.

 

Nuclear Reactor

A system in which controlled nuclear fisson reactions generate heat energy on a large scale, which is subsequently converted into electrical energy.

Condensed States

The solid and liquid states.

Molar Solubility

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

Absolute Entropy (of a substance)

The increase in the entropy of a substance as it goes from a perfectly ordered crystalline form at 0 °K (where its entropy is zero) to the temperature in question.

Entropy is a measure of the “dilution” of thermal energy.

Oxidation Numbers

Arbitrary numbers that can be used as mechanical aids in writing formulas and balancing equations, for single- atom ions they correspond to the charge on the ion, more electronegative atoms are assigned negative oxidation numbers (also called Oxidation states).

Raoult's Law

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