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Question- A 10.0ml aliquot of an Fe^3+ unknown is diluted to 50.0ml. A 5.0ml portion of the 50.0ml is then reduced to Fe62+ and treated with 1, 10-phenanthroline; the resulting solution has an A= 0.233 (512 nm). A 2.2 X 10^-5 M standard solution of Fe^3+ reduced and treated with 1, 10-phenanthroline without dilution has A =0.577 (512nm).

a) Calculate the molarity of Fe^3+ in the 50.0ml solution

b) Calculate the molarity in the original unknown

c) Calculate the ppmof Fe^3+ in the 10.0ml aliquot.

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Category:- Chemistry
Reference No.:- M91233712

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