The concentration of H2S in wastewater samples was determined by coulometric titration using Kl as mediator and I3 as "titrant". H2S(ag) + 13 (ag) + 2H2Ou) --> 2H3O*(aq) + 31 (ag) + S(s) A 50 mL wastewater sample was placed in a coulometric cell, added with excess KI and starch indicator. Electrolysis was carried out at a constant current of 84.6 mA for 386 s to reach the end point of the titration. What is the concentration of H2S in the sample (in ppm)?

The concentration of H2S in wastewater samples was determined by coulometric titration using Kl as mediator and I3 as "titrant". H2S(ag) + 13 (ag) + 2H2Ou) --> 2H3O*(aq) + 31 (ag) + S(s) A 50 mL wastewater sample was placed in a coulometric cell, added with excess KI and starch indicator. Electrolysis was carried out at a constant current of 84.6 mA for 386 s to reach the end point of the titration. What is the concentration of H2S in the sample (in ppm)?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.20QAP

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