Grade 12th passInorganic Chemistry
Arrange H2SO4,HCl, HNO3,HBr in increasing order of acidic nature..... .....
Arrange H2SO4,HCl, HNO3,HBr in increasing order of acidic nature..... .....
1 Answer
Arun
Well, of those three, nitric acid has the highest pKa value (the log of the acid dissociation constant value Ka relative to the hydronium ion H3O+), followed by sulphuric acid and hydrochloric acid
- HNO3: -1.64
- H2SO4: -3.0 (first dissociation only i.e to H3O+ and HSO4-)
- HCl: -6.3
So HCl is the strongest of the three, followed by sulphuric and nitric acids. All three do though completely dissociate in water, so act as strong acids in that medium.
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