Question

what is amphoteric nature explain​

Answer 1

Explanation:

an amphoteric compound is a molecule or ion that can react both as an acid and as a base. Many metals (such as copper, zinc, tin, lead, aluminium, and beryllium) form amphoteric oxides or hydroxides.

Answer 2

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Amphoteric nature - It is related to having the characteristics of an acid and a base and capable of reacting chemically either as an acid or a base.

Example - Water is amphoteric - it is able to act as either an acid or a base. At a pH of 7 (neutral), the concentration of hydroxide ions (OH−) is equal to that of the hydronium (H3O+) or hydrogen (H+) ions. If the equilibrium is disturbed, the solution becomes acidic (higher concentration of hydronium ions) or basic (higher concentration of hydroxide ions).

Water can act as either an acid or a base in reactions.

According to the Brønsted-Lowry system, an acid is defined as a species which donates a proton (an H+ ion) in a reaction, and a base as one which receives a proton. When reacting with a stronger acid, water acts as a base; when reacting with a stronger base, it acts as an acid.

For instance, it receives an H+ ion from HCl in the equilibrium -

HCl + H2O ⇌ H3O+ + Cl−

Here water is acting as a base, by receiving an H+ ion.

In the reaction with ammonia, NH3, water donates an H+ ion, and is thus acting as an acid -

NH3 + H2O ⇌ NH4+ + OH–

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