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Similar to water, many of the transition metal hydroxide salts are amphoteric. Using Al(OH)3(s) as the...

Similar to water, many of the transition metal hydroxide salts are amphoteric. Using Al(OH)3(s) as the example, write balanced chemical reactions that demonstrate it is amphoteric.

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Answer #1

Compound act as acid in presence base and act as base in presence of acid called amphoteric compound.

Al(OH)3 is amphoteric in nature.

explained by following example

when acid react with base form salt and water, when we react Al(OH)3 with HCl to form salt of AlCl3 and water.

Al(OH)3 + 3HCl   AlCl3 + 3H2O

in above reaction Al(OH)3 act as base.

when base react with acid to form salt and water, wnen we react Al(OH)3 with NaOH to form salt NaAlO2 and water.

Al(OH)3 + NaOH NaAlO2 + 2H2O

in above reaction Al(OH)3 act as acid.

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