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PIMSO 2023 - Science - Senior Secondary - National Round Question 9

PIMSO Science · PIMSO 2023 - Science - Senior Secondary - National Round

Question 9

Even if adobo has many varieties, one main component unites this popular Filipino dish: acidity. This flavour is usually due to vinegar that contains acetic acid. Acetic acid is a weak acid, with a so that only a small amount dissociates in water in an equilibrium reaction: CH₃COOH + H₂O ⇌ CH₃COO⁻ + H₃O⁺ Identify all the bases in this reaction.
  1. H₂O only
  2. CH₃OO⁻ only
  3. CH₃OO⁻ and H₃O⁺
  4. H₂O and CH₃OO⁻
  5. H₂O, CH₃OO⁻, and H₃O⁺