Problem: Which weak acid-conjugate base combination would be ideal to form a buffer with a pH of 7.54. a) Butanoic acid and Potassium butanoate (Ka = 1.5 × 10–5) b) Benzoic acid and Sodium benzoate (Ka = 6.3 × 10–5) c) Acetic acid and Lithium acetate (Ka = 1.8 × 10–5) d) Ammonium chloride and Ammonia (Kb = 1.8 × 10–5) e) Hypochlorous acid and sodium hypochlorite (Ka = 2.9 × 10–8)

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Problem Details

Which weak acid-conjugate base combination would be ideal to form a buffer with a pH of 7.54. 

a) Butanoic acid and Potassium butanoate (Ka = 1.5 × 10–5

b) Benzoic acid and Sodium benzoate (Ka = 6.3 × 10–5

c) Acetic acid and Lithium acetate (Ka = 1.8 × 10–5

d) Ammonium chloride and Ammonia (Kb = 1.8 × 10–5

e) Hypochlorous acid and sodium hypochlorite (Ka = 2.9 × 10–8)

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