Ascorbic acid vitamin c is a diprotic acid of molecular, Ask an Expert

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Ascorbic acid (vitamin C) is a diprotic acid of molecular weight176 g/mol. A sample of a vitamin supplement was analyzed bytitrating a 0.100 g sample dissolved in water with 0.020 M NaOH. A volume of 15.2 mL of the base was required to completely neutralizethe ascorbic acid. What was the mass percent of ascorbic acid in the sample?

At room temperature (25°C), 45 mL of a 0.002 M acid solutionreacts with 30 mL of a NaOH (aq) solution (pH = 11.95), determine (through calculations) whether the acid is phosphoric acid (H3PO4),acetic acid (CH3COOH), or carbonic acid (H2CO3).

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