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One twelfth of a mass of an atom of the carbon-12 isotope, a unit used for stating atomic and formula weights, also called dalton.

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Solvent

The dispersing medium of a solution.

Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Electrode Potentials

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

Heterogeneous Catalyst

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

Nuclear Binding Energy

Energy equivalent of the mass deficiency, energy released in the formation of an atom from the subatomic particles.

 

Heavy Water

Water containing deuterium, a heavy isotope of hydrogen.

Degenerate

Of the same energy.

Buffer Solution

Solution that resists change in pH, contains either a weak acid and a soluble ionic salt of the acid or a weak base and a soluble ionic salt of the base.

Osmotic Pressure

The hydrostatic pressure produced on the surface of a semipermable membrane by osmosis.

Mass Spectrometer

An instrument that measures the charge-to-mass ratio of charged particles.