-Assignments 09-Elec × (-) Dubs. CHEM-1120-01L-G odule ? https://elearn chattano

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-Assignments 09-Elec × (-) Dubs. CHEM-1120-01L-G odule ? https://elearn chattanoogastate edu/d2Lle/content/7150646V?ewContent/51155173/View M-1120-01L - General Chemistry lI tent MaterialsToolsActivitiesUser nts Module 09- Electrochemistry Module 9: Activities & Assignments Quiz 9 Module 09 -Electrochemistry 9 Module 09- Electrochemistry Module 09 Electrochemistry 0:45:00 Time Left:0:31:33 Christian Bolano: Attempt 1 estions Question 3 (1 point) What is the cell potential, E, for the following reaction and conditions? 2 Al3 (aq)3 Cd (s) 2 Al (s)+3 Cd2 (aq), (Al3 0.26 M. [Cd 21 0.35 M R 8.314 J/Kmol: F 96500 J/Vmol stions saved stion 1 Saved F4 FB Home 1End FT F8 F9 F10 F11 F12 2@E3#

Explanation / Answer

From standard electrochemical series find standard electrode potentials of aluminium and cadmium .

E° Al3+ = -1.66V. E° Cd2+ = -0.40V

E°Cell= E° reduction -E° Oxidation = -0.40-(-1.66)= 1.26V

Now use this expression (Nernst equation)

Ecell= E°cell-(0.0591/n) log[oxidised species]3/[reduced species]^2

E cell= 1.26-(0.0591/6)log[(0.35)^3]/[0.26]2

Ecell= 1.2619V

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