What do you understand by the term 'auto-protolysis' of water? What is its significance?
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The reaction between two water molecules to produce hydronium ion and hydroxide ion is known as autoprotolysis of water. This is self ionization of water. 2H2O→H3O++OH− This reaction indicates the amphoteric nature of water. It can act as an acid as well as a base. One water molecule donates electron whereas other water molecule accepts electron.