[shon1802]

A redox reaction occurs when mixing Sb₂O₅ with S₂O₃^2- but doest occure when mixing Sb₂O₅ with Hg. A reaction doenst occur when mixing SnCl₆^2- with S₂O₂^2-.

Grade the reduction potentials of the following half reactions:

2H₂SO₃ + 2H⁺ + 4e^-  S₂O₃^2- + 3H₂O
SnCl₆^2- + 2e^-  Sn²⁺ + 6Cl^-
1/2 Hg₂²⁺ +e^-  Hg
Sb₂O₅ + 6H⁺ + 4e^-  2Sb(OH)₂⁺ + H₂O

Thanks!

[Arkcon]

Greetings, shon1802:,and welcome to the Chemical Forums.  According to the Forum Rules{click}, we'd like to see the beginnings of your attempt.