The aqueous solution of which of the following can form a buffer solution?
Correct answer: D. All of these
- A. HF & NaF
- B. NH₃ & NH₄Cl
- C. H₂CO₃ & NaHCO₃
- D. All of these
Explanation
A buffer solution consists of a weak acid and its conjugate base, or a weak base and its conjugate acid. All three options represent such conjugate pairs and can therefore form effective buffer solutions.
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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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