The amount of ascorbic acid in a vitamin C tablet is determined by titration with a solution of iodi — Laboratory Chemistry Question
Question
The amount of ascorbic acid in a vitamin C tablet is determined by titration with a solution of iodine in aqueous potassium iodide. A small amount of starch is added to the vitamin C solution before the titration. What is the function of the starch?
A.✓ Correct
It forms an intensely colored complex with triiodide ion.
B.
It increases the viscosity of the analyte solution.
C.
It catalyzes the dissociation of triiodide into iodine and iodide.
D.
It binds to the inert ingredients of the vitamin C tablet.
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