InterviewSolution
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InterviewSolution
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A `200 mL` sample of a citrus fruit drinks containing ascorbic acid (vitamin `C, mol. We 176.13`) was acidified with `H_(2)SO_(4)` and `10mL` of `0.250M I_(2)` was added. Some of the iodine was reduced by the ascorbic acid to `I^(-)`. The excess of `I_(2)` required `4.6mL` of `0.01M Na_(2)S_(2)O_(3)` for reduction. What was the vitamin `C` content of the drink in `mg` vitamin per `mL` drink? The reactions are: `C_(6) H_(8) O_(6) + I_(2) rarr C_(6) H_(6) O_(6) + 2HI` `5H_(2)O + S_(2)O_(3)^(2-) + 4I_(2) rarr 2SO_(4)^(2-) + 8I^(-) + 10H^(-)` |
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Answer» Correct Answer - `0.058mg//mL` |
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