Un alcali, écrit alkali à la fin du XVIIIe siècle pour marquer l'origine arabe via le latin médiéval, est un terme de l'alchimie puis de la chimie décrivant différents composés chimiques, parfois en mélange, à propriétés dites alcalines ou basiques.
Wikipedia
Un composé chimique. Selon Lewis, un composé capable de fournir des électrons . Selon Brönsted, c'est un composé capable de capter un ou plusieurs ions H+.
Wikipedia Disambiguation
Terme de chimie aujourd'hui, d'alchimie autrefois
Wikidata
Tout composé chimique, ionique ou moléculaire, capable de capturer un proton (ion hydrogène) d'une autre substance; l'autre substance agit comme un acide en cédant le proton.
OmegaWiki
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