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OXIDO BASICO [1 record]

Record 1 2011-02-18

English

Subject field(s)
  • Chemical Elements and Compounds
DEF

A metallic oxide that is a base, or that forms a hydroxide when combined with water, such as sodium oxide to sodium hydroxide.

CONT

Basic oxides are all metallic oxides, but there is a great variation in the degree of basicity ... There is a gradual transition from basic to acidic oxides and certain oxides, as aluminum oxide, show both acidic and basic properties.

French

Domaine(s)
  • Éléments et composés chimiques
DEF

Corps provenant de la déshydratation d'une base; ex. CaO, FeO, BeO, ThO2, Cr2O3.

CONT

La théorie de Lewis explique l'action de certains corps non hydrogénés sur les indicateurs colorés [...] Ainsi, elle explique la formation des sels par fusion d'un oxyde acide avec un oxyde basique : SiO2 + 2 CaO [=] Ca2SiO4, acide + base [=] sel.

CONT

En raison de leur formule, les bases précédentes (Na2O, CaO) sont également nommées hydroxydes des métaux correspondants. [...] Il leur correspond en général, par perte d'eau, un oxyde dit «oxyde basique» du métal.

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
DEF

Óxido que forma un hidróxido si se combina con el agua y que puede neutralizar sustancias ácidas.

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