Sample titration - estimation of vitamin c in a solution, Biology

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Define Sample Titration - estimation of vitamin c in a solution?

Take the given unknown solution provided to you in a 100 ml volumetric flask. Dilute the sample ascorbic acid solution to the mark with 3% metaphosphoric acid. Mix well.

Pipette 10 ml of this dilute solution into a 100 ml conical flask and titrate against the dye solution till a light pink colour appears which persists for 30 seconds.

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