Which one of the following is the correct equation of 1st ionization of sulphuric acid?
Correct answer: B. H2SO4(aq) + H2O(l) --> H+(aq) + HSO4-
- A. H2SO4(aq) + H2O(l) --> H+ + SO42-
- B. H2SO4(aq) + H2O(l) --> H+(aq) + HSO4-
- C. H2SO4(aq) + H2O(l) --> 2H+ + SO42-
- D. H2SO4(aq) + H2O(l) --> H3O+ + SO42-
Explanation
The 1st ionisation equation involves dissociation of 1 H+ ion from H2SO4, followed by second H+ dissociation in the second ionisation.
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About Bronsted-Lowry and Lewis Concepts
The Brønsted-Lowry concept defines acids as proton donors and bases as proton acceptors, producing conjugate acid-base pairs. The Lewis concept extends the idea to electron-pair acceptors and donors, so compounds such as BF3 and NH3 can be treated as acid and base even without proton transfer, unlike the Arrhenius definition.
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