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Liquid triester of glycerol and unsaturated fatty acids.

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Ion Product for Water

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

Anode

In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.

 

Magnetic Quantum Number (mc)

Quantum mechanical solution to a wave equation that designates the particular orbital within a given set (s, p, d, f ) in which a electron resides.

Absolute Zero

The zero point on the absolute temperature scale, -273.15°C or 0 K, theoretically, the temperature at which molecular motion ceases. The concept of an absolute zero temperature was first deduced from experiments with gases. When a fixed volume of gas is cooled, its pressure decreases with its temperature. Absolute zero physically possesses quantum mechanical zero-point energy.

Dispersing Medium

The solvent-like phase in a colloid.

Substance

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

 

Heterogeneous Catalyst

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

Enthalpy

The heat content of a specific amount of substance, defined as E= PV.

Reversible Reaction

Reactions that do not go to completion and occur in both the forward and reverse direction.