Calculate the weight percent of ascorbic acid in a tabletof Vitamin C from the following data:

A 80 mg sample of a crushedVitamin C tablet was dissolved in 40 mL ofH₂SO₄ and 20 mL ofwater. Two grams of KI and 40. mLof 0.00653 M KIO₃solution was added, and the mixture titrated to a starchendpoint. The titration required 15 mLof 0.0510 M thiosulfate solution. I knowthe answer is 88%, but how did they get it?

Question

Calculate the weight percent of ascorbic acid in a tabletof Vitamin C from the following data:

A 80 mg sample of a crushedVitamin C tablet was dissolved in 40 mL ofH₂SO₄ and 20 mL ofwater. Two grams of KI and 40. mLof 0.00653 M KIO₃solution was added, and the mixture titrated to a starchendpoint. The titration required 15 mLof 0.0510 M thiosulfate solution. I knowthe answer is 88%, but how did they get it?

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