Posted by beth on Friday, January 25, 2013 at 5:44pm.
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 - DrBob222, Friday, January 25, 2013 at 9:07pm
Fe in the K4Fe(CN)6 is +2 oxidation state; probably it was oxidized to +3 by oxygen in the air.