Problem

Traces of aniline, C6H5NH2, in drinking water can be determined by reaction with an excess...

Traces of aniline, C6H5NH2, in drinking water can be determined by reaction with an excess of electrolytically generated Br2:

The polarity of the working electrode is then reversed, and the excess Br2 is determined by a coulometric titration involving the generation of Cu(I):

Suitable quantities of KBr and CuSO4 were added to a 25.0-mL sample containing aniline. Calculate the number of micrograms of C6H5NH2 in the sample from the data:

Working Electrode

Functioning As

Generation Time with Constant

Current of 1.51 mA, min

Anode

3.76

Cathode

0.270

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Solutions For Problems in Chapter 22

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