# Can the ion that isn't preferentially discharged discharge at the same time during electrolysis?

I would like to ask if the ion that isn't preferentially discharged can discharge at the same time during electrolysis. Also, is the ion discharged at a much smaller extent or just discharged right after the one that is preferentially discharged being used up?

• Yes. It depends on the overvoltage of the given ion. – Maurice Apr 21 at 8:26