Question
Chemistry Question on Electrochemistry
The standard electrode potentials of some electrodes are given below:
Fe3+/Fe2+ 0.77V; Br2/Br- 1.09V; I2/I- 0.54V; Zn2+/Zn(s) -0.76V;
Ag+/Ag(s) 0.80V; Fe2+/Fe(s) -0.44V; Cu2+/Cu(s) 0.34V
Predict the reaction that is not feasible:
A
Fe3(aq) oxidises I-(aq)
B
Ag+(aq) oxidises Cu(s)
C
Ag(s) reduces Fe3-(aq)
D
Br2(aq) oxidises Fe2+(aq)
E
Zn(s) reduces Cu2+(aq)
Answer
Ag(s) reduces Fe3-(aq)
Explanation
Solution
The correct option is (C) : Ag(s) reduces Fe3-(aq)