Unlabelled solutions of [Fe(OH 2 ) 6 ]Cl 2 and [Fe(OH 2 ) 6 ]Cl 3 have
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Unlabelled solutions of [Fe(OH 2 ) 6 ]Cl 2 and [Fe(OH 2 ) 6 ]Cl 3 have been confused. How could a piece of litmus paper help determine the identity of the two solutions?
a. The iron(IV) solution should be more acidic.
b. The iron(II) solution should be more acidic.
c. The iron(III) solution should be more acidic.
d. It will not help at all.
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