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Unformatted text preview: are much more complicated than simple acid/base reactions. You should
balance all the reactions described in this experiment before coming to the laboratory. 1 Safety: Wear gloves when handling bleach. Wear your goggles.
Work in Pairs on this experiment.
Part I. Standardization of Sodium Thiosulfate Solution
Plan out a titration procedure for the standardization of a sodium thiosulfate solution.
The following chemicals will be provided for you in the lab:
Solid potassium iodate (Must be dried in oven)
Solid potassium iodide
3 M sulfuric acid
1 M sodium thiosulfate
3% ammonium molybdate solution (This is a catalyst.)
Starch solution (This is the indicator you will use)
Do not contaminate the chemicals. The solutions in the reagent bottles should be
colorless. If they are brown they have been contaminated and should be returned to the
dispensary. The most common source of contamination is due to leaving caps off the
chemical bottles and using the same disposable pipet for more than one chemical. Be
vigilant! Do n...
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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