Acidic buffer consists of:
Correct answer: B. Weak acid and salt of it with a strong base
- A. Strong acid and salt of it with a weak base
- B. Weak acid and salt of it with a strong base
- C. Strong acid and salt of it with a strong base
- D. Weak acid and salt of it with a weak base
Explanation
The formation of a buffer solution requires a weak base OR a weak acid with its salt with a strong acid OR a strong base respectively, which is only stated in option B. A and C are incorrect because strong acid with its salt does not form a buffer solution; weak acids with its salt forms a buffer solution. D is theoretically not possible because a weak acid can not react with a weak base to form a salt.
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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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