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 )

Question

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 ), 4 × 10 - 2 N, 2 × 10 - 2 N, 6 × 10 - 2 N, 8 × 10 - 2 N

MARKS App · Accepted Answer

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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