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gcse chemistry aqueous electrolysis

hi

im revising electrolysis of aqueous solutions, and i know that of the two sets of ions (the H+ and OH- from water, and whatever ions from the other compound), the more reactive of the two ions remains in solution. so one product is formed at each electrode.

i know how to tell if hydrogen is more reactive than teh other positive ion, but how about OH-? how do i know if oxygen is formed at the other electrode?

sorry, this is probably a really stupid question, but im confused lol. thank you in advance! :smile:
Original post by asbestos99
hi
im revising electrolysis of aqueous solutions, and i know that of the two sets of ions (the H+ and OH- from water, and whatever ions from the other compound), the more reactive of the two ions remains in solution. so one product is formed at each electrode.
i know how to tell if hydrogen is more reactive than teh other positive ion, but how about OH-? how do i know if oxygen is formed at the other electrode?
sorry, this is probably a really stupid question, but im confused lol. thank you in advance! :smile:

basically. to know if oxygen is formed yk that Oxygen is negative ion O2- so that will form at the positive anode. now if the negative part of the electrolyte is a Halogen (Br2, Cl2 ect...) then it will form at the anode or else it is JUST OXYGEN!!!

hope this helps?
Original post by asbestos99
yesss this is super helpful thank you so much!!! so unless its a halogen ion then the product is oxygen?
thank you, youre saving my exams lmao

yea yea

nws

https://youtu.be/tqtLObhq2vg?si=5L8lcrJjhaTEJ7KO

watch this vid before you sleep. its acc alright.
Reply 3
Original post by jthestudent_
yea yea
nws
https://youtu.be/tqtLObhq2vg?si=5L8lcrJjhaTEJ7KO
watch this vid before you sleep. its acc alright.

looks good, thanks!

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