Question

Give one example for each of the following:

a) A diprotic acid >>

b) An insoluble strong base >>

c) An amphoteric substance >>

Answer 1

a)A diprotic acid is an acid that can donate two proton or hydrogen atom per molecule to an aqueous solution.

Examples: Sulfuric acid (H2SO4) is a diprotic acid.

b)A strong base is something like sodium hydroxide or potassium hydroxide which is fully ionic. ... Each mole of sodium hydroxide dissolves to give a mole of hydroxide ions in solution. Some strong bases like calcium hydroxide aren't very soluble in water.

C)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. Al₂O₃ is an example of an amphoteric oxide.