Ascorbic acid, H₂C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pk1 is 4.10 and pKa2 is 11.79. When 125 mL of a solution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 3.30 g. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. i What was the pH of the ascorbic acid solution before it was evaporated? pH = i What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated? i M M

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Ascorbic acid, H₂C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pk1 is 4.10 and pKa2 is 11.79. When 125 mL of a
solution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 3.30 g.
Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. i
What was the pH of the ascorbic acid solution before it was evaporated? pH = i
What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated? i
M
M
Transcribed Image Text:Ascorbic acid, H₂C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pk1 is 4.10 and pKa2 is 11.79. When 125 mL of a solution of ascorbic acid was evaporated to dryness, the residue of pure ascorbic acid had a mass of 3.30 g. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. i What was the pH of the ascorbic acid solution before it was evaporated? pH = i What was the concentration of the ascorbate ion, C6H6062, before the solution was evaporated? i M M
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