Interaction | Reaction | Process Data Page
The peroxodisulfate(VI) ion reacts with iodide ion to give sulfate ion and iodine. However, the reaction is very slow even though it is energetically favorable. The reason is that both ions have a net negative charge, they repel each other and so are unlikely to collide.The reaction is catalysed with Fe2+ ions. V3+ ions can also be employed.
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