A tablet of vitamin ‘C’ is analysed for its ascorbic acid content. One tablet reacts exactly with 20ml of 0.1 N NaOH solution. The equivalent weight of ascorbic acid is 176. The tablet contains ______mg of ascorbic acid

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35.2

3.52

0.352

352

answer is A.

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Detailed Solution

$no . of equivalents of ascorbic acid = no . of equivalents of NaOH {(\frac{Wt .}{E})}_{ascorbic acid} = \frac{NV (ml)}{1000} \frac{x}{176} = \frac{0.1 \times 20}{1000} x = 0.352 g$

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