Explain the amphoteric nature of water in short
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water shows amphoteric nature because on reaction with acid or base it break into ions ..
when it reacts with acid hydrogen ions react with the acid give h2 molecules whereas when it react with base it give OH showing the property of base
when it reacts with acid hydrogen ions react with the acid give h2 molecules whereas when it react with base it give OH showing the property of base
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Amphoteric substance is that substance which has ability to donate as well as accept a Proton.
According to Bronsted -Lowry concept,bases stronger than water,tend to accept proton from it.Thus by donating proton,water acts as an acid.
H₂O + NH₃ <==> OH- + NH₄+
While acid stronger than water,like HCl ,tend to donate proton to water.Thus by accepting proton from such strong acids,water acts as base.
H₂O + HCl <===> H₃O+ + Cl-
Thus water can donate as well as accept proton and show amphoteric nature.
According to Bronsted -Lowry concept,bases stronger than water,tend to accept proton from it.Thus by donating proton,water acts as an acid.
H₂O + NH₃ <==> OH- + NH₄+
While acid stronger than water,like HCl ,tend to donate proton to water.Thus by accepting proton from such strong acids,water acts as base.
H₂O + HCl <===> H₃O+ + Cl-
Thus water can donate as well as accept proton and show amphoteric nature.
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