An acid solution of a KReO_4sample containing 26-83 mg of combined rhenium was reduced by passage through a column of granulated zinc. The effluent solution, including the washings from the column, was then titrated with 0.1 N KMnO_4 . 11.45 mL of standard permanganate was required for the reoxidation of all the rhenium to the perrhenate ion, ReO_4^- .Assuming that Re was the only element reduced, what is the oxidation state to which Re was reduced by the zinc column? (Re = 186.2)

An acid solution of a KReO_4sample containing 26-83 mg of combined rhe

1.	An acid solution of a KReO_4sample containing 26-83 mg of combined rhenium was reduced by passage through a column of granulated zinc. The effluent solution, including the washings from the column, was then titrated with 0.1 N KMnO_4 . 11.45 mL of standard permanganate was required for the reoxidation of all the rhenium to the perrhenate ion, ReO_4^- .Assuming that Re was the only element reduced, what is the oxidation state to which Re was reduced by the zinc column? (Re = 186.2)
Answer» SOLUTION :-1 OXD. STATE