140. Solving a chemistry problem
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Product description
- A weighed portion of antimony weighing m g was transferred into a solution and the aluminum contained as an impurity was isolated in the form of oxyquinolinate. After purification and dissolution of the precipitate in hydrochloric acid, a coulometric titration of oxyquinoline with bromine generated from KBr at a constant current strength of 8.5 mA was carried out.The equivalence point found biamperometrically corresponded to the electrolysis time t.
Calculate the mass fraction (%) of aluminum in antimony according to the following data:
Option 1
m, g 0.5000
t, s 114
Additional information
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