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Unformatted text preview: tablet for each trial. Do this by
scaling up to find the amount (mg) of ascorbic acid in your 250 mL flask. What is your
calculated mass of ascorbic acid in the Vitamin C tablet, for each trial?
What is the average for your determination of the mass of ascorbic acid in the Vitamin C
What is the standard deviation of the mass of ascorbic acid in the Vitamin C tablet?
In the final part of the experiment, you were asked to examine the protective ability of
oxalic acid in preventing the oxidative degradation of Vitamin C by catalytic ferric ions.
At the beginning of the experiment you or one of your partners prepared two solutions
containing ascorbic acid and ferric ions. In one of these solutions oxalic acid was added
and the two solutions were set aside in open containers.
When you titrated a sample from each of these solutions, one containing oxalic acid and
one without oxalic acid, which solution required more NBS to reach the endpoint in the
How many trials did you complete for the analysis of the ascorbic acid/ferr...
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- Spring '07