A solution is to be standardized by titration KMnO$4($aq$)$

against As$2$O$3($s$)$

$.$ A $0\mathrm{.}1076-$g

sample of As$2$O$3$

requires $23\mathrm{.}05$ mL

of the KMnO$4($aq$)$

for its titration.

$5$As$2$O$3+4$MnO$4+9$H$2$O$+12$H$+->10$H$3$AsO$4+4$Mn$2+$

$.$ What is the molarity of the KMnO$4($aq$)$

$?$

Express your answer using four significant figures.

Part B

An iron ore sample weighing $0\mathrm{.}9108$ g

is dissolved in HCl$($aq$)$

$,$ and the iron is obtained as Fe$2+($aq$)$

$.$ This solution is then titrated with $33\mathrm{.}20$ mL

of $5\mathrm{.}028102$ M

K$2$Cr$2$O$7($aq$)$

$.$

$6$Fe$2++14$H$++$Cr$2$O$276$Fe$3++2$Cr$3++7$H$2$O

Part A

What is the mass percent Fe

in the ore sample?

please answer correctly, i tried before on chegg.but expert answer wrong. i want accurate answer.