Chemistry
Give three reasons with equations wherever required, why Sulphuric acid is a dibasic acid.
Answer
Sulphuric acid (H2SO4) is a dibasic acid as :
- It ionises in aq. soln. to produce two hydrogen ions per molecule of the acid.
- It dissociate in two steps in aq. soln. as shown below:
H2SO4 + H2O ⇌ H3O+ + HSO4-
HSO4- + H2O ⇌ H3O+ + SO42-
H2SO4 + 2H2O ⇌ 2H3O+ + SO42- - It contains two replaceable hydrogen ions per molecule of the acid so forms two types of salt [acid and normal salt] :
NaOH + H2SO4 ⟶ NaHSO4 (Acid Salt) + H2O
2NaOH + H2SO4 ⟶ Na2SO4 (Normal Salt) + 2H2O
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