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For acid-base titrations, organic compounds that exhibit different colors in solutions of different acidities, used to determine the point at which reaction between two solutes is complete.

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Reaction Quotient

The mass action expression under any set of conditions (not necessarily equlibrium), its magnitude relative to K determines the direction in which the reaction must occur to establish equilibrium.

Chemical Equation

Description of a chemical reaction by placing the formulas of the reactants on the left and the formulas of products on the right of an arrow.

Saturated Solution

Solution in which no more solute will dissolve.

Chemical Periodicity

The variations in properties of elements with their position in the periodic table.

Functional Group

A group of atoms that represents a potential reaction site in an organic compound.

Ternary Acid

A ternary compound containing H, O, and another element, often a nonmetal.

Electronic Transition

The transfer of an electron from one energy level to another.

Diamagnetism

Weak repulsion by a magnetic field.

DP number

The degree of polymerization, the average number of monomer units per polymer unit.

Breeder Reactor

A nuclear reactor that produces more fissionable nuclear fuel than it consumes.