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Unformatted text preview: h indicator solution. You may approximate the 2/3 mL of 6
M acetic acid here by delivering between 0.5 and 0.75 mL of 6 M acetic acid, using a
disposable pipet. As you approach the end point you should see the blue color form where the drop
enters but go away again when the flask is swirled. Repeat this titration at least two
Analyzing commercial Vitamin C: Perform the above titration procedure at least
three times using the" solution of the commercial Vitamin C tablet and thereby
obtaining the data needed to compute the ascorbic acid content of this product.
Part III. Investigation of degradative factors on ascorbic acid. Effect of Metal Ions
Titrate a 10.00 mL aliquot of the ascorbic acid solution containing metal ions as well as
titrate a 10.00 mL aliquot of the ascorbic acid solution containing metal ions plus the
oxalic acid following the procedures given in Part II under Assaying your NBS solution.
Repeat these titrations to obtain more accurate results by using another 10.00 mL aliquot
if there is time.
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This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.
- Spring '07