In 10.0 mL of caffeine in water sample, 20.0 mL of 0.1M iodine solution and 2.0 mL of sulfuric acid were added. Using a 0.02M sodium thiosulfate solution iodomometric back titration was done. If 2 ml of sodium thiosulfate was used in the traction, how much caffeine was in the 10 ml solution?

In 10.0 mL of caffeine in water sample, 20.0 mL of 0.1M iodine solution and 2.0 mL of sulfuric acid were added. Using a 0.02M sodium thiosulfate solution iodomometric back titration was done. If 2 ml of sodium thiosulfate was used in the traction, how much caffeine was in the 10 ml solution?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter21: Potentiometry

Section: Chapter Questions

Problem 21.13QAP

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Step 1: Reaction between Caffeine and Iodine

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Step 2: Calculating moles of thiosulfate used

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Step 3: Calculating the Mass of Caffeine

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