posted a question
Peroxodisulfate ion can oxidize iodide ions to iodine according to the balanced equation
S2O82- + 2I- → 2SO42- + I2.
The reaction is catalyzed by certain chemical species. Identify the catalyst in the following mechanism:
step 1: Fe3+ + 2I - → Fe2+ + I2
step 2: S2O82- + Fe2+ → 2SO42- + Fe3+