alkali

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alkali

alkali [Arab., al-gili =ashes of saltwort], hydroxide of an alkali metal . Alkalies are readily soluble in water and form strongly basic solutions with a characteristic acrid taste. They neutralize acids, forming salts and water. Strong alkalies (e.g., those of sodium or potassium) are sometimes called caustic alkalies. The term alkali originally applied to salts obtained from plant ashes and is sometimes applied to a carbonate of sodium or potassium or to the hydroxide of an alkaline-earth metal .

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alkali

A Dictionary of Biology | 2004 | Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

alkali A base that dissolves in water to give hydroxide ions (OH^–).

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alkali

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

alkali Soluble base that reacts with an acid to form a salt and water. A solution of an alkali has a pH greater than 7. Alkali solutions are used as cleaning materials. Strong alkalis include the hydroxides of the alkali metals and ammonium hydroxide. The carbonates of these metals are weak alkalis.

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