Question

The reaction, \( 2I^- + S_2O_8^{2-} \rightarrow I_2 + 2SO_4^{2-} \), is catalysed by:

• A. Iron(II)
• B. Manganese(VI)
• C. Iron(III)
• D. Vanadium(V)
• E. Cobalt(III)

Hint:

Iron(III) acts as a catalyst in many redox reactions by facilitating electron transfer without being consumed in the reaction.

Answer 1

The Correct Option is C

Iron(III) catalyzes the reaction by providing an alternative pathway with a lower activation energy. In this reaction, \( {Fe}^{3+} \) helps in the oxidation of iodide ions, accelerating the production of iodine and sulfate ions.