Traces of aniline can be determined by reaction with an excess of electrolytically generated Br2: C6H5NH2 + 3Br2 =====è C6H2Br3NH2 + 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): Br2 + 2Cu+ ===è 2Br- + 2Cu2+Suitbale quantities of KBr and copper (II) sulfate were added to a 25.0 ml sample containing aniline (C6H5NH2). Calculate the mass in micrograms of C6H5NH2 in the sample from the accompanying data. Working electrode Functioning as Generation Time (min) with a constant current of 1.00 mAAnode3.76cathode0.270

Given, Current(I) = 1.00 mA= 1.00 x 10-3 A. Generation time for anode = 3.76 min. Generation time…

Answered: Traces of aniline can be determined by…

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

ChapterA1: Evaluation Of Analytical Data

Section: Chapter Questions

Problem A1.23QAP

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Traces of aniline can be determined by reaction with an excess of electrolytically generated Br₂:

C₆H₅NH₂ + 3Br₂ =====è C₆H₂Br₃NH₂ + 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):

Br₂ + 2Cu⁺ ===è 2Br^- + 2Cu²⁺

Suitbale quantities of KBr and copper (II) sulfate were added to a 25.0 ml sample containing aniline (C₆H₅NH₂). Calculate the mass in micrograms of C₆H₅NH₂ in the sample from the accompanying data.

Working electrode Functioning as

Generation Time (min) with a constant current of 1.00 mA

Anode

3.76

cathode

0.270

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