The strongest conjugate base is:
Correct answer: D. CH3COO-
- A. NO3-
- B. Cl-
- C. SO42-
- D. CH3COO-
Explanation
The strength of a conjugate base is inversely related to the strength of its conjugate acid. A weaker acid results in a stronger conjugate base. CH3COO- is the conjugate base of acetic acid, which is a weak acid; hence, it is the strongest conjugate base among the options. NO3- (from HNO3), Cl- (from HCl), and SO42- (from H2SO4) are derived from stronger acids, making them weaker conjugate bases.
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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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