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when a solution of Iron (II)ammonium sulfate was mixed with K4FE(CN)6, the precipitate was initially white but turned blue upon exposure to air. what happen to the Iron(II)ionwhen the precipitate turned blue

  • chmisrty - ,

    Fe in the K4Fe(CN)6 is +2 oxidation state; probably it was oxidized to +3 by oxygen in the air.

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