question_answer

An acid solution of \[0.2\text{ }mol\]of \[K\operatorname{Re}{{O}_{4}}\]was reduced with \[Zn\]and then titrated with \[1.6\text{ }Eq\]of acidic \[KMn{{O}_{4}}\] solution. For the reoxidation of all the Rhenium \[(\operatorname{Re})\] to the Perrhenate ion \[({{\operatorname{ReO}}_{4}}^{\Theta })\]. Assuming that rhenium was the only element reduced. The oxidation state to which rhenium was reduced by \[Zn\]is ______.

Answer:

-1