Consider the cell S.C.E. i cell solution | Pt(s), whose voltage is 20.126 V. The cell solution

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Consider the cell S.C.E. i cell solution | Pt(s), whose voltage is 20.126 V. The cell solution contains 2.00 mmol of Fe(NH4)2(SO4)2, 1.00 mmol of FeCl3, 4.00 mmol of Na2EDTA, and lots of buffer, pH 6.78, in a volume of 1.00 L.

(a) Write a reaction for the right half-cell.

(b) Find the quotient [Fe2+]/[Fe3+] in the cell solution. (This expression gives the ratio of uncomplexed ions.) 

(c) Find the quotient of formation constants: (Kf for FeEDTA2)/ (Kf for FeEDTA2-).

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