(4 pts.) Iron(II)iodide is electrolyzed. Write the equations for the anode reaction and the cathode reaction...
- (4 pts.) Iron(II)iodide is electrolyzed.
- Write the equations for the anode reaction and the cathode reaction if the FeI2 is molten.
- Write the equations for the anode reaction and the cathode reaction if the FeI2 is in aqueous solution (show work, including comparison with electrolysis of water).
Homework Answers
a. FeI2(l) --------------> Fe^2+(l) +2I^- (l)
At anode
2I^- (l) -------------> I2(s) + 2e^- oxidation half reaction
at cathode
Fe^2+(l) + 2e^- --------------> Fe(s)
b. FeI2(aq) ---------------> Fe^2+ (aq) + 2I^- (aq)
at anode
2I^- (aq) -------------->I2(s) + 2e^-
at cathode
2H2O(l) + 2e^- ---------------> H2(g) + 2OH^-
Fe^2+ (aq) + 2OH^- (aq) -------------> Fe(OH)2 (aq)
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