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2 KMnO 4 + 3 H 2 SO 4 + 5 H 2 O 2 → K 2 SO 4 + 2 MnSO 4 + 8 H 2 O + 5 O 2 Find the nonnality of H 2 O 2 solution, if 20   mL of it is required to react completely with 16   mL of 0 . 02 MKMnO 4 solution. ( Molar mass of KMnO 4 = 158   g   mol - 1 )

Options

  1. A4 × 10 - 2   N
  2. B2 × 10 - 2   N
  3. C6 × 10 - 2   N
  4. D8 × 10 - 2   N

Correct answer

D. 8 × 10 - 2   N

Step-by-step solution

n . f .   of   H 2 O 2 = 2 n . f .   of   KMnO 4 = 5 Number of mequivalents of   H 2 O   2 = Number of mequivalents of   KMnO 4 N 1 V 1 = N 2 V 2 N 1 = N 2 V 2 V 1 = ( 0 . 02 × 5 ) × 16 20 = 0 . 08   N

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