Question
Experiment: Redox titration;determination of ascorbic acid by an iodometric back-titration
Why is sodium carbonate added to the thiosulfate solution ?
why is the water used for preparing the thiosulfate solution boiled ?
Why is sodium carbonate added to the thiosulfate solution ?
why is the water used for preparing the thiosulfate solution boiled ?
Answers
You want the pH to be about 9 and Na2CO3 will do that. It aids in preventing decomposition of the thiosulfate.
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