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 Form 4 Chemistry online lessons on acids, bases and salts

Reaction of acids with amphoteric oxides and hydroxides

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Answer Text:
Reaction of acids with amphoteric oxide and hydroxide
- Oxides react with acids to form a salt and water only in a reaction called neutralization reaction.
Equations
Oxides:
i)PbO(s)+2H+(aq)Pb2++H2O(l)
ii)Al2O3(s)+6H+2Al3+(aq)+3H2O(l)
iii)ZnO(s)+2HCl(aq)ZnCl2(aq)+H2O(l)
Hydroxides:
i)Pb(OH)2(s)+2HCl(aq)PbCl2(aq)+2H2O(l)
ii)Zn(OH)2(s)+2HCl(aq)ZnCl2(aq)+2H2O(l)
iii)Al(OH)3(s)+3HCl(aq)AlCl3(aq)H2(l)
Note: in these reactions the metal oxides are reacting as bases


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