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Why ZnO is amphoteric?

Updated: 8/18/2019
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13y ago

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Zn is not highly electro positive. So, in ZnO molecule Zn gets a small partial positive charge and O gets a small partial negative charge. Thus it can accept the lone pairs as well as donate the lone pairs and can act as Lewis acid and Lewis base simultaneously. That's why ZnO is amphoteric.

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Q: Why ZnO is amphoteric?
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Inchemistry, an amphoteric substance is one that can react as either an acid or base.Many metals (such as zinc, tin, lead, aluminium, and beryllium) and most metalloids have amphoteric oxides or hydroxides.Zinc oxide (ZnO) reacts differently depending on the pH of the solution:In acids: ZnO + 2H+ → Zn2+ + H2OIn bases: ZnO + H2O + 2OH- → [Zn(OH)4]2-This effect can be used to separate different cations, such as zinc from manganese.


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