Write the overall reaction d Calculate E degree. e. How many electrons are trans
ID: 521875 • Letter: W
Question
Write the overall reaction d Calculate E degree. e. How many electrons are transferred in this reaction? f. Calculate the cell potential Given Cu (s) | Cu^+2 (aq. 0.30 M) | Fe^+3 (aq. 0.1 M). Fe^+2 (aq, 0.2 M) | pt Calculate the cell potential. A voltaic (Galvanic) cell is prepared by dipping a Ag wire in a 0.15 M Ag' solution and a Ni strip in a solution containing 0.2 M Ni^+2. Write the balanced chemical (redox) equation for this cell and calculate the cell potential What is AG for the cell. Electrolysis of a Cr^+3 solution to plate Cr metal is performed using a current of 1.5 amps. How many grams of Cr will plate out after 1 hour?Explanation / Answer
9 )
oxidation : Cu----------------> Cu+2 + 2e- , Eo = 0.34 V
reduction : Fe+3 + e- ----------------> Fe+2 , Eo = 0.771 V
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overall reaction : Cu + 2 Fe+3 ------------------------> Cu+2 + 2Fe+2 , Eocell = 0.771 - 0.34 = 0.431 V
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Q = [Fe+2]^2 [Cu+2] / [Fe+3]^2
Q = (0.2)^2 (0.3) / (0.1)^2
Q = 1.2
Ecell = Eo cell - 0.05916 / n * log Q
= 0.431 - 0.05916 / 2 * log (1.2)
= 0.429 V
cell potential = 0.429 V
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