Why zinc consider as amphoteric oxide?

Question

Answer

Firstly u should know what are amphoteric oxides:-

#AMPHOTERIC OXIDES:- the metal oxides which react with acid as well as bases are called amphoteric oxides.

since zinc oxide react with acid as well as alkali solution that's why zinc oxide is considered as amphoteric oxide.

Thank you... :-)

Answer

Metal oxides are usually basic and they react with acids to form their respective salts. But amphoteric oxides react with both acids and alkalis to form salts. ZnO reacts with hydrochloric acid forming zincchloride and water. With sodium hydroxide, it forms sodium zincate and water.

Answer

ZINC is not considered as amphoteric oxide
OR
ZINC OXIDE is. ..............

THERE are many differences between ZINC and ZINC OXIDE .

if u mean zinc oxide then your answer ......

• zine oxide show acidic and basic nature both.
• zine reacts with acid to form salt and water.
• zinc also reacts with base to form salt and water .

Answer

Zinc consider as amphoteric oxide because it reacts with both acid and basic.

Answer

Zinc as an Amphoteric Oxide

Zinc oxide (ZnO) is considered an amphoteric oxide due to its ability to exhibit both acidic and basic properties. This means that it can react with both acids and bases, behaving as an acid in the presence of a base and as a base in the presence of an acid. The amphoteric nature of zinc oxide arises from its unique electronic structure and bonding characteristics.

Electronic Structure and Bonding in Zinc Oxide

Zinc oxide is composed of zinc cations (Zn2+) and oxide anions (O2-). The zinc cations have a positive charge due to the loss of two electrons, while the oxide anions have a negative charge due to the gain of two electrons. The ionic bonds between these oppositely charged ions give rise to the crystal lattice structure of zinc oxide.

However, zinc oxide also exhibits covalent bonding to some extent. The oxygen atom in the oxide ion has a lone pair of electrons, which can be donated to form a covalent bond with a Lewis acid. This covalent nature allows zinc oxide to behave as an amphoteric compound.

Acidic Properties of Zinc Oxide

When zinc oxide reacts with a strong base, such as sodium hydroxide (NaOH), it acts as an acid by donating its loosely held oxygen atoms. The zinc cation accepts electrons from the hydroxide ions, forming water molecules and zincate ions:

ZnO + 2NaOH → Na2ZnO2 + H2O

In this reaction, zinc oxide acts as an acid by accepting a pair of electrons from hydroxide ions, resulting in the formation of zincate ions and water. This acidic behavior is characteristic of amphoteric compounds.

Basic Properties of Zinc Oxide

On the other hand, when zinc oxide reacts with an acid, such as hydrochloric acid (HCl), it acts as a base by accepting a proton (H+) from the acid. This results in the formation of zinc chloride and water:

ZnO + 2HCl → ZnCl2 + H2O

In this reaction, zinc oxide acts as a base by accepting a proton from the hydrochloric acid, leading to the formation of zinc chloride and water. This basic behavior further supports its amphoteric nature.

Conclusion

Zinc oxide is an amphoteric oxide due to its ability to react with both acids and bases. Its electronic structure and bonding characteristics allow it to exhibit acidic properties when reacting with a base and basic properties when reacting with an acid. This unique behavior makes zinc oxide a versatile compound with various applications in industries such as cosmetics, pharmaceuticals, and electronics.

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