A solution of Cu* is undergoing a redox titration by the addition of Ce**. The standard reduction half-reactions and potentials are given. Ce* +e=Ce* E = +1.72 V Cu2+ +e Cu* E = +0.161 V The table shows the properties of four redox indicators. Color Indicator Oxidized Reduced E" (V) yellow-green 5,6-dimethylphenanthroline (Fe complex) indigotrisulfonic acid phenosafranine red +0.97 blue colorless +0.33 red colorless +0.28 viologen colorless blue -0.43 Select a suitable indicator to observe the end point. viologen indigotrisulfonic acid 5,6-dimethylphenanthroline (Fe complex) phenosafranine Which color change would you observe at the end point? red to colorless red to yellow-green yellow-green to red blue to colorless
A solution of Cu* is undergoing a redox titration by the addition of Ce**. The standard reduction half-reactions and potentials are given. Ce* +e=Ce* E = +1.72 V Cu2+ +e Cu* E = +0.161 V The table shows the properties of four redox indicators. Color Indicator Oxidized Reduced E" (V) yellow-green 5,6-dimethylphenanthroline (Fe complex) indigotrisulfonic acid phenosafranine red +0.97 blue colorless +0.33 red colorless +0.28 viologen colorless blue -0.43 Select a suitable indicator to observe the end point. viologen indigotrisulfonic acid 5,6-dimethylphenanthroline (Fe complex) phenosafranine Which color change would you observe at the end point? red to colorless red to yellow-green yellow-green to red blue to colorless
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter19: Principles Of Chemical Reactivity: Electron Transfer Reactions
Section19.6: Electrochemistry And Thermodynamics
Problem 1RC
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