Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 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 4.14 g. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. i I M 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

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Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 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 4.14 g.
Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. i
I
M
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
Transcribed Image Text:Ascorbic acid, H2C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 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 4.14 g. Calculate the molar concentration of ascorbic acid in the solution before it was evaporated. i I M 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
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