Electrolysis of Aqueous Sodium Iodide

AI Thread Summary
The discussion centers on the discharge of ions at the anode during electrolysis, specifically the I- ion versus the OH- ion. The chemistry textbook states that the I- ion is discharged, while standard electrode potential values suggest that the OH- ion should be discharged instead. A chemistry teacher advises revisiting GCSE principles, which support the preferential discharge of halide ions like I-. Participants express a need for clarity on this apparent contradiction and agree to share findings once resolved.
PFuser1232
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According to my chemistry textbook, the I- ion is discharged at the anode. Yet, according to standard electrode potential values, the OH- ion should be discharged at the anode. Thoughts on this please?
 
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I asked my Chemistry teacher the same thing, she told me to revisit my GCSE textbook and according to those principles of electrolysis, the halide ion should be preferentially discharged. Just as you have said, according to the principles of SEP, the hydroxide ion should be discharged. When you get an answer, please let me know and I will do likewise.
 

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