24-11 Traces of aniline can be determined by reaction with an excess of electrolytically generated Br,:CH;NH, + 3Br, C,H,Br,NH, + 3H + 3BrThe polarity of the working electrode is then reversed, and the excess bromine is determined by acoulometric titration involving the generation of Cu(I):Br, + 2Cu*→ 2Br + 2Cu2+Suitable quantities of KBr and copper(II) sulfate were added to a 25.0-mL sample containing aniline.Calculate the mass in micrograms of C,H;NH, in the sample from the accompanying data:Generation Time (min)Working ElectrodeFunctioning Aswith a Constant Currentof 1.00 mAAnode3.76Cathode0.270

The chemical reaction would be given as, Generation time for anode = 3.76 min. Generation time for…

Traces of aniline can be determined by reaction with an excess of electrolytically generated Br;: C,H;NH, + 3Br, → CH,Br,NH, + 3H + 3Br The polarity of the working electrode is then reversed, and the excess bromine is determined by a coulometric titration involving the generation of Cu(I): Br, + 2Cu+ 2Br + 2Cu²+ Suitable quantities of KBr and copper(II) sulfate were added to a 25.0-mL sample containing aniline. Calculate the mass in micrograms of C,H;NH, in the sample from the accompanying data: Generation Time (min) Working Electrode Functioning As with a Constant Current of 1.00 mA Anode 3.76 Cathode 0.270

Traces of aniline can be determined by reaction with an excess of electrolytically generated Br;: C,H;NH, + 3Br, → CH,Br,NH, + 3H + 3Br The polarity of the working electrode is then reversed, and the excess bromine is determined by a coulometric titration involving the generation of Cu(I): Br, + 2Cu+ 2Br + 2Cu²+ Suitable quantities of KBr and copper(II) sulfate were added to a 25.0-mL sample containing aniline. Calculate the mass in micrograms of C,H;NH, in the sample from the accompanying data: Generation Time (min) Working Electrode Functioning As with a Constant Current of 1.00 mA Anode 3.76 Cathode 0.270

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.

Question

24-11 Traces of aniline can be determined by reaction with an excess of electrolytically generated Br,:
CH;NH, + 3Br, C,H,Br,NH, + 3H + 3Br
The polarity of the working electrode is then reversed, and the excess bromine is determined by a
coulometric titration involving the generation of Cu(I):
Br, + 2Cu*
→ 2Br + 2Cu2+
Suitable quantities of KBr and copper(II) sulfate were added to a 25.0-mL sample containing aniline.
Calculate the mass in micrograms of C,H;NH, in the sample from the accompanying data:
Generation Time (min)
Working Electrode
Functioning As
with a Constant Current
of 1.00 mA
Anode
3.76
Cathode
0.270

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