Question

Electrochemistry questions

What is reduced in the follwing reaction?

Cr₂O₇^2-(aq) + 6S₂O₃^2-(aq) + 14H⁺(aq)---- 2Cr³⁺(aq) +3S₄O₆^2-(aq) + 7H₂O(l)

a) H+,

b)S4O6^2-

c) S2O3^2-

d)Cr2O7^2-

e) Cr³⁺