0.3 g of an oxalate salt was dissolved in 100 mL of water. The solution required 90 mL of N/20 for complete oxidation. The mass percentage of oxalate ion in the salt is:

Question

0.3 g of an oxalate salt was dissolved in 100 mL of water. The solution required 90 mL of N/20 $KMnO_4$ for complete oxidation. The mass percentage of oxalate ion in the salt is:

Prashant Kotian · Accepted Answer

Correct answer: B. Milli-equivalents of used = meq = equivalents. By equivalence, eq of oxalate = . Equivalent weight of = Molar mass / 2 = 88 / 2 = 44 g/eq. Mass of oxalate = g. Percentage = .

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