This is for unit 5 chemistry.
I just dont understand them. Theres nothing about the equilibrium positions of redox reactions in the AQA nelson thornes book unless im missing it somewhere.
But for example, the question.
The cell represented below was set up.
Pt|Fe2+ (aq), Fe3+ (aq) || BrO3- (aq), Br2(aq)|Pt
(iii) Deduce what change in the concentration of Fe3+(aq) would cause an increase in the e.m.f. of the cell. Explain your answer.
Here is the EMF of the cells in question
Fe3+(aq) + e- --> Fe2+(aq) ########################## +0.77
2BrO3- (aq) + 12H+ (aq) + 10e- --> Br2(aq) + 6H2O(l) ####### +1.52