Given: Ascrobic acid (H2C6H6O6)
Ka1 = 8.0x10-5
• 1st equilibrium reaction: H2C6H6O6(aq) + H2O(l) → HC6H6O6-(aq) + H3O+(aq
Ka2 = 1.6x10-12
• 2nd equilibrium reaction: HC6H6O6-(aq) + H2O(l) → C6H6O62-(aq) + H3O+(aq)
• H3O+(aq) is also produced from the 2nd equilibrium reaction
What is the pH of a 0.28 M solution of ascorbic acid (Vitamin C)? (The values for Ka1 and Ka2 for ascorbic acid are 8.0 x 10-5 and 1.6 x 10-12, respectively.)
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