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I am studying a galvanic cell, and the cathode uses potassium hydroxide as its electrolyte. I am getting confused as to what gets reduced when electrons come from the anode.

I believe it would be the hydrogen ions (because the solvent is water) as potassium ion would never want to accept an electron (because it has a configuration of a noble gas as an ion and is therefore very stable). However, the pH of the solution would be very basic because KOH is the electrolyte; thus, the reduction potential value of hydrogen ion should also decrease.

Can someone please tell me what the right answer is?

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  • $\begingroup$ What are the electrodes made of? $\endgroup$ – Zhe Feb 12 '17 at 0:07
  • $\begingroup$ aluminum is the anode and platinum is the cathode electrode $\endgroup$ – user510 Feb 12 '17 at 4:42
  • $\begingroup$ Platinum is generally inert, so I would check half reactions involving aluminum... $\endgroup$ – Zhe Feb 12 '17 at 16:17
  • $\begingroup$ no platinum is the electrode that will be in the KOH electrolyte. $\endgroup$ – user510 Feb 12 '17 at 22:51
  • $\begingroup$ Yes, but the platinum is just there to conduct. It doesn't actually do anything chemistry. $\endgroup$ – Zhe Feb 13 '17 at 3:07

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