A 10 g mixture of and was treated with 200 mL of 0.75 M in acid solution producing

CHEMISTRY · Subjective · CBSE · Chemistry · Redox Reactions · Redox Reactions

Problem

A 10 g mixture of

\text{Cu}_2\text{S}

and

\text{CuS}

was treated with 200 mL of 0.75 M

\text{MnO}_4^-

in acid solution producing

\text{SO}_2

\text{Cu}^{2+}

and

\text{Mn}^{2+}

. The

\text{SO}_2

was boiled off and the excess of

\text{MnO}_4^-

was titrated with 175 mL of 1 M

\text{Fe}^{2+}

solution. Calculate % of

\text{CuS}

in original mixture.