question_answer

A mixture of FeO and \[F{{e}_{2}}{{O}_{3}}\] is completely reacted with 100 mL of 0.25 M acidified \[KMn{{O}_{4}}\] solution. The resultant solution was then treated with Zn dust which converted \[F{{e}^{3+}}\] of the solution to\[F{{e}^{2+}}\]. The \[F{{e}^{2+}}\] required 1000 mL of \[0.10\,M\,\,{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] solution. Find out the weight percentage of \[F{{e}_{2}}{{O}_{3}}\]in the mixture.

Answer:

80.85