不只是氧化为碘单质吧,碘酸根还原为碘单质的电位为+1.20V,而过二硫酸根还原为硫酸根的电位为+2.01V,即过二硫酸根的氧化性强于碘酸根,因此该反应能将碘化钾氧化为碘酸钾:
KI+3(NH4)2S2O8+3H2O=KIO3+6NH4HSO4
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