20 mL of H2O2 after acidification with dilute H2SO4 required 30 mL of \frac{N}{12} KMnO4 for complete oxidation. The strength of H2O2 solution is : [Molar mass of H2O2 = 34]

Engineering

Chemistry

Equivalent Mass of Oxide Metal Peroxide

Question

20 mL of H₂O₂ after acidification with dilute H₂SO₄ required 30 mL of $\frac{N}{12}$ KMnO₄ for complete oxidation. The strength of H₂O₂ solution is : [Molar mass of H₂O₂ = 34]

8 g/L

6 g/L

2 g/L

4 g/L

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meq. of KMnO₄ = meq of H₂O₂

$30 \times \frac{1}{12}$ = 20 × N' ⇒ N^' = $\frac{30}{12 \times 20} = \frac{1}{8}$ N

strength = N' × equivalent mass = $\frac{1}{8}$ x 17 = 2.12 g/L

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