el aluminio esta recubierto por una capa protectora de oxido de - TopicsExpress

el aluminio esta recubierto por una capa protectora de oxido de aluminio, este oxido de aluminio reacciona con la base y forma un complejo de hidroxido de aluminio (el aluminio forma muy facilmente complejos de coordinacion que presentan equilibrio la adicionar acidos o bases). el aluminio queda desprotegido y reacciona vigorosamente con la solucion y desprende hidrogeno La reacción es la siguiente: Al + NaOH + H2O -----> AlO2Na + 3/2 H2 La reacción es bastante rápida y exotérmica, si se calcula bien la cantidad de agua los residuos son totalmente sólidos. En teoría la reacción es completa con 35 gramos de aluminio, 40 de sosa y 18 de agua. Por cada gramo de aluminio se obtienen aproximadamente 10 litros de hidrogeno.

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