The reaction of persulfate ions, $$\(\mathrm{S}_{2} \mathrm{O}_{8}{ }^{2-}\)$$, with iodide ions is catalysed by $$\(\mathrm{Fe}^{2+}\)$$ ions. Write two equations to show how $$\(\mathrm{Fe}^{2+}\)$$ catalyses reaction 1 . equation 1 ............................................................................................................................. equation 2 .............................................................................................................................

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