In a reaction, C r 2 O 7 2 - is reduced to C r 3 + . What will be the concentration of 0.1 M K 2 C r 2 O 7 in equivalent per litre? Cr 2 O 7 2 − + 14 H + + 6 e − → 2 Cr 3 + + 7 H 2 O

Question

In a reaction, C r 2 O 7 2 - is reduced to C r 3 + . What will be the concentration of 0.1 M K 2 C r 2 O 7 in equivalent per litre? Cr 2 O 7 2 − + 14 H + + 6 e − → 2 Cr 3 + + 7 H 2 O, 0.9 N, 0.6 N, 0.3 N, 0.2 N

MARKS App · Accepted Answer

N = M × Valence factor ∵ N = 0.1 × 6 2 Cr 6 + + 6 e − → 2 Cr 3 + K 2 C r 2 O 7 = 0.6 N .

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