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11. Solving a chemistry problem
Uploaded:
18.07.2023
Content: 9.zip 17,56 kB
Content: 9.zip 17,56 kB
Product description
9. Titration of sodium thiosulfate, used as an auxiliary solution for the determination of copper ions in Fehling´s reagent, was carried out with iodine electrogenerated from an acetate buffer solution containing 1.66 g of KI using a KTT biamperometric display system. After pre-electrolysis of KI, when the potential of the indicator system was 40 mV, 2 cm3 of 0.1 N sodium thiosulfate solution was placed in the coulometric cell and titrated at a constant current of 50 mA. How much time was spent on the analysis?
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