Question

What are amphoteric substance explain with example ?​

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. Amphoterism depends on the oxidation states of the oxide.

Answer 2

Amphoteric substances are substances or compounds that show reactivity with both acids and bases.

• They are also known as Amphiprotic (can donate or accept proton) substances.
• These substances can either act as acid or base depending upon the medium in which they are placed.
• Aluminium, copper, zinc, etc are a few metals that can form amphoteric oxides.
• The oxidative state of oxide determines the properties of the amphoteric substances.
• For example, the bicarbonate ion is amphoteric.
• It loses a proton to form acid:
• Equation - $HCO_{3}^{-}$ → $CO_{3}^{2-}$ + $H^{+}$
• While it accepts a proton to form base:
• Equation - $HCO_{3}^{-}$ + $H^{+}$ → $H_{2}CO_{3}$
• Other examples of amphoteric substances include Water, zinc oxide, beryllium hydroxide, etc.