Answer to Question #56950 in Other Chemistry for emma
O2 + 4e- + 4H+ → 2H2O E0O/4OH-=+1.23 V
As we have seen in the reactions involving hydrogen ions. Supplier of hydrogen ions is water. With an increase pH to 9-10, corrosion reaction practically stops. Therefore, the reaction occurs in the presence of oxygen dissolved in water, the water takes on the role of the electrolyte.
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