Short-lived species formed by the collision of dissolved ions of opposite charges.
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xenon hexafluoride
A colorless, crystalline compound, XeF6, that melts at 50°C to a yellow liquid, and boils at 75°C.
Amphoterism
The ability to react with both acids and bases.Ability of substance to act as either an acid or a base.
Distilland
The material in a distillation apparatus that is to be distilled.
Substance
Any kind of matter all specimens of which have the same chemical composition and physical properties.
Hydrogen
Discovered : by Henry Cavendish in 1766.
Isolated in London, UK.
Origin : The name is derived from the Greek ‘hydro genes’, meaning water forming.
Description :A colourless, odourless gas that burns and can form an explosive mixture with air. It is currently manufactured from methane gas, but is also produced by the electrolysis of water and aqueous salts. The gas is used to make such key materials as ammonia, cyclohexane and methanol, which are intermediates in the production of fertilisers, plastics and pharmaceuticals. Some see hydrogen gas as the clean fuel of the future - generated from water and returning to water when it is oxidised. Hydrogen-powered fuel cells are increasingly being seen as pollution-free sources of energy.
Graham's Law
The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.
Secondary Standard
A solution that has been titrated against a primary standard. A standard solution is a secondary standard.
Common Ion Effect
Suppression of ionization of a weak electrolyte by the presence in the same solution of a strong electrolyte containing one of the same ions as the weak electrolyte.
Electrolyte
A substance whose aqueous solutions conduct electricity.
Use of diamonds
Diamond is a crystalline modification of pure carbon formed in the deep interior of the Earth, in the upper mantle at depths of more than 80-100 kilometers, at exceptionally high pressure and temperature. It is the most precious stone, the hardest and most wear-resistant mineral, the most brilliant and timeless gem.
