CHEM25 periodicity Flashcards by Jimmy Yuan

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General trend of oxides along period 3

Na, Mg: basic
Al: amphoteric
SI, S, Cl:: basic

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Explain why aluminum oxide is amphoteric

Can neutralize both base and acid.
with HCl: forms aluminum chloride and water
with strong bases: Al3+ covalently bonds to hydroxide to form complex ion

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Reaction of sodium oxide with water

Na2O + H2O –> 2Na+ + O2-;
O2- + H2O –> 2OH- (basic)

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Reaction of magnesium oxide with water

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CHEM25 periodicity Flashcards

(4 cards)