Cell diagrams - how to draw them

jsmith613

1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution

I always thought you put the electrolyte of one half cell on one side and the other electrolyte on the other side

The answer given is C.
But this includes VO₂⁺ which is not in the initial eqn on the RHS?

Borek

Try to split the reaction into half reactions.

jsmith613

V³⁺ + H₂O = VO²⁺ + 2H⁺
VO₂⁺ + H₂o = VO²⁺ + 2h⁺

Borek

They are not balanced yet (you ignored electrons), but you are on the right track.

Do you see why C?

jsmith613

Well V³⁺ is oxidised (reducing agent) and VO₂⁺ is reduced (oxidising agent).
I think you are supposed to put the stronger reducing agent on the left side?

Borek

Isn't it what they did?

jsmith613

...of course....I think I just get confused between VO²⁺ and VO₂⁺.

...I guess though this will help me in exams as I will be more aware of what is going on....thanks for helping me :)