Ascorbic acid ( vitamin C ) content in soluble vitamin C tablets was studied using iodometric titration.
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Ascorbic acid vitamin C content in soluble vitamin C tablets was studied using iodometric titration. For the sample solution, soluble vitamin tablet with a mass of g was taken for analysis, dissolved in water and transferred to a mL volumetric flask. mL of M HCl solution was added to the sample and the flask was then filled to the mark with deionized water and mixed carefully.
To prepare a solution for titration, mL KIO solution with concentration of mmolL mL of KI solution and mL M HCl solution were added to an Erlenmeyer flask to create a free iodine containing solution according to this reaction:
KIOKI HCl IKCl HO
mL sample solution, prepared as described above, was then added to the same flask. Part of iodine reacted with ascorbic acid CHO from the sample as follows:
I CHO CHOHI
Part of iodine remained unreacted and was titrated with NaSO solution with concentration of mmolL:
INaSO NaSONaI
The average titrant volume used over four replicate titrations was mL with a standard deviation of mL
Related Book For
Fundamentals of Physics
ISBN: 978-1118230725
10th Extended edition
Authors: Jearl Walker, Halliday Resnick
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