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Acids

Substances wh...

Question

Substances which behave both as an acid and a base are known as ?

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Solution

Substances which behave both as acid and base are known as Amphoteric.
Eg- $H_{2} O$ molecule accepts proton and act as Bronsted-lowry base.
$H_{2} O + H C l ⟶ H_{3} O^{+} + C l^{-}$
(acting as base)
$H_{2} O$ molecule donates proton and acts as Bronsted-lowry acid.
$H_{2} O + N H_{2}^{-} ⟶ O H^{-} + N H_{3}$

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