A student used a DCP solution (standardized to 9.98x10-4M) to analyze a sample of extract from 2.50g of solid food. The titration required 22.49mL of DCP. 87.00% of all the ascorbic acid in the food was collected in the extract. (MM Ascorbic Acid = 176.124 g/mol)

What mass of food (in grams) would be required to attain the RDA of ascorbic acid (60 mg)

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Chemistry

Johnathan Joyce

8 December, 07:50

A student used a DCP solution (standardized to 9.98x10-4M) to analyze a sample of extract from 2.50g of solid food. The titration required 22.49mL of DCP. 87.00% of all the ascorbic acid in the food was collected in the extract. (MM Ascorbic Acid = 176.124 g/mol)

What mass of food (in grams) would be required to attain the RDA of ascorbic acid (60 mg)

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Bethany Mckee · Answer 1

Given that the molarity of DCP equals 9.98x10-4M. And it used to analyze a sample of extract from 2.50g of solid food. The titration required 22.49mL of DCP. 87.00% of all the ascorbic acid in the food was collected in the extract.

Amount of solid = 60 mg AA (100mg/87mg) (1g/1000mg) (1 mol AA/176.124 gAA) (1mol DPC/1mol AA) (1L DCP/9.98x10-4mol DPC) (2.50g solid/0.02249 L DPC) = 43.6 g solid.