Which of the following constitutes a set amphiprotic species?
Correct answer: C. H2O, H2PO3- , HPO42-
- A. H3O+, H2PO4- , HCO-3
- B. H2O , HPO4-2 , H2PO2-
- C. H2O, H2PO3- , HPO42-
- D. HC2O4-, H2PO4-, SO42-
Explanation
H3O+ cannot take up proton; H2PO2- cannot give up proton, SO2− 4 cannot give proton.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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