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One faraday of electricity corresponds to the charge on 6.022 x 1023 electrons, or 96,487.301 coulombs.

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Precipitate

An insoluble solid formed by mixing in solution the constituent ions of a slightly soluble solution.

Emulsifying Agent

A sustance that coats the particles of the dispersed phase and prevents coagulation of colloidal particles, an emulsifier.

Ketone

Compound in which a carbonyl group is bound to two alkyl or two aryl groups, or to one alkyl and one aryl group.

Helium

Discovered : by Sir William Ramsay in London, and independently by P.T. Cleve and N.A. Langlet in Uppsala, Sweden in 1895.
Origin : The name is derived from the Greek ‘helios’,sun.
Description :A colourless, odourless gas that is totally unreactive. It is extracted from natural gas wells, some of which contain gas that is 7% helium. It is used in deep sea diving for balloons and, as liquid helium, for low temperature research. The Earth’s atmosphere contains 5 parts per million by volume, totalling 400 million tons, but it is not worth extracting it from this source at present.
Atomic No:2 MAss No:4

Molality

Concentration expressed as number of moles of solute per kilogram of solvent.

Rate of Reaction

Change in the concentration of a reactant or product per unit time.

Percent by Mass

100% times the actual yield divided by theoretical yield.

Coordination Compound or Complex

A compound containing coordinate covalent bonds.

Boiling Point

The temperature at which the vapor pressure of a liquid is equal to the applied pressure, also the condensation point

Electron Configuration

Specific distribution of electrons in atomic orbitals of atoms or ions.