Question
Chemistry Question on Electrochemistry
Stand electrode potential are Fe+2/Fe Eº = – 0.44 Fe+3/Fe+2 Eº = 0.77 If Fe+2, Fe+3 and Fe block re kept together, then
A
Fe^+3 increases
B
Fe^+3 decreases
C
Fe^+2/Fe^+3 reamins unchanged
D
Fe^+2 decreases
Answer
Fe^+3 decreases
Explanation
Solution
The correct option is(B): Fe^+3 decreases. The direction of the redox reaction is determined by the difference in standard electrode potentials (E° values), and it proceeds from the species with a lower E° value (Fe^2+) to the species with a higher E° value (Fe^3+), resulting in an increase in the concentration of Fe^3+ and a decrease in the concentration of Fe^2+.