Half Equations Flashcards
1
Q
Half equation at positive and negative electrode for sodium sulfate
A
Negative electrode
2H+ +2e minus —-H2
When it is more reactive than hydrogen
Positive electrode
4OH minus —-2H20+O2+4e
When there is no halide present
2
Q
Half equation at the positive and negative electrode for nickelbromide
A
Negative electrode
Ni2+ + 2e minus —->Ni
Nickel will be produced since it’s less reactive than hydrogen
Positive electrode
2Br minus —br2 +2e minus
Halide is present
3
Q
Half equations of sodium hydroxide
A
2H+ +2e minus —->h2
4OH minus —> 2h20 + O2+4e minus
4
Q
Molten aluminium oxide
A
Cathode
Al3+ +3e minus +Al
Anode
202——02+4e minus
