Water is amphoteric because:
Correct answer: E. Both A and C
- A. It acts both as an acid and a base
- B. It can dissolve both acids and bases
- C. It can give off H+ and OH- ions
- D. In its pure form, it has pH=7
- E. Both A and C
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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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