In the electrochemical cell shown here, the concentrations of Mn2+ and Cr3+ are 1.5x10-5 and 0.25 mol L-1, respectively. What is the cell potential?= E0.0257 V-InQKNO,MnMn(NO3)2Cr(NO3)3Mn* (aq) + 2e2 Mn(s)E° =-1.18 VCr* (aq) + 3e¯2 Cr(s)E° =-0.74 V

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Chemistry

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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

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Corrosion is defined as an activity that transforms refined metals into more chemically stable forms such as oxide, hydroxide, carbonate, or sulfide. It refers to the slow decomposition of things (typically metals); thanks to chemical and/or electrochemical reactions with their surroundings. Corrosion engineering is the science of preventing and controlling corrosion.

Corrosion

Question

In the electrochemical cell shown here, the concentrations of Mn2+ and Cr3+ are 1.5x10-5 and 0.25 mol L-1, respectively. What is the cell potential?
= E
0.0257 V
-InQ
KNO,
Mn
Mn(NO3)2
Cr(NO3)3
Mn* (aq) + 2e
2 Mn(s)
E° =-1.18 V
Cr* (aq) + 3e¯
2 Cr(s)
E° =-0.74 V

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