| LC control no. | sh 85003591 |
|---|---|
| LC classification | QD172.A4 Chemistry TP222 TP223 Technology |
| Topical heading | Alkalies |
| Variant(s) | Alkalis |
| See also | Bases (Chemistry) |
| Subject example tracing | Example under Chemicals |
| Found in | Dictionary.com, July 17, 2012 (alkali; plural: alkalis, alkalies; 1. Chemistry. a. any of various bases, the hydroxides of the alkali metals and of ammonium, that neutralize acids to form salts and turn red litmus paper blue. b. any of various other more or less active bases, as calcium hydroxide. c. (not in technical use) an alkali metal. d. Obsolete. any of various other compounds, as the carbonates of sodium and potassium.) Chemicool dictionary, via WWW, July 17, 2012 (alkali: any compound that has highly basic properties. Alkalis are often hydroxides of alkali metals (metals that belong to group IA of the periodic table, including Li, Na, K, Rb, Cs, and Fr)) Wikipedia, July 17, 2012 (In chemistry, an alkali is a basic, ionic salt of an alkali metal or alkaline earth metal element. Some authors also define an alkali as a base that dissolves in water. A solution of a soluble base has a pH greater than 7. The adjective alkaline is commonly used in English as a synonym for base, especially for soluble bases. This broad use of the term is likely to have come about because alkalis were the first bases known to obey the Arrhenius definition of a base and are still among the more common bases.) |
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