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  • How many gram of  should be taken to make up 250 ml of a solution of such strength that 1ml is equivalent to 5Mg o

How many gram of KmO_4 should be taken to make up 250 ml of a solution of such strength that 1ml is equivalent to 5Mg of Fe in FeSo_4

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best_answer

1 mL = 5 mg of Fe,
Then 250 mL =

250×5=1250mg Fe=1.25g Fe

KMnO_4+5 Fe^{2+}+8 H^{+} \rightarrow Mn^{2+}+5 Fe^{3+}+4 H_2 O

\frac{1.25}{55.85} \approx 0.02238 \text { equivalents }

\frac{\text { Molar mass }}{n}=\frac{158}{5}=31.6

0.02238 \times 31.6 \approx 0.707 g

Posted by

Divya Sharma

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