Question

A solution contains ${Fe^{2+}, Fe^{3+}}$ and $I^-$ ions. This solution was treated with iodine at ${ 35^{\circ} C. E^{\circ}}$ for ${Fe^{3+} /Fe^{2+}}$ is $+0.77 \, V$ and $E^{\circ}$ for $I_2/2I^- = 0.536 \, V.$ The favourable redox reaction is-

• A. ${Fe^{2+}}$ will be oxidized to ${Fe^{3+}}$
• B. $I_2$ will be the reduced to $I^-$
• C. There will be no redox reaction
• D. $I^-$ will be oxidized to $I_2$

Answer 1

Answer: (D)

$I^-$ will be oxidized to $I_2$

Answer 2

${2Fe^{=3} + 2I^- -> I_2 + 2Fe^{=2}}$