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A formulation containing low concentrations of FeCl2 was trialled, on the basis that it could be marketed with the tag line "boost your iron levels". However, once the powder was made up with water and exposed to the air, a brown sediment formed over time. Reaction of Fe2+(aq) with oxygen to produce a ferric (Fe3+) species is suspected.
One proposed reaction is
__ Fe2+(aq) + __ O2(aq) + __ H+(aq) ® __ Fe3+(aq) + __ H2O(l)
Q10(a) Write balanced half equations for the oxidation and reduction reactions, including electrons with their charge.
ANSWER
Oxidation reaction:
Reduction reaction:
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