Mass of KHC2O4 (potassium acid oxalate) required to reduce 100 ml of 0.02 M KMnO4 in acidic medium to Mn2+ is x g and to neutralize 100 ml of 0.05 M CaOH2 is y g, then
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a
x = y
b
2x = y
c
x = 2y
d
none is correct
answer is B.
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Detailed Solution
Eq. of KMnO4 = Eq. of KHC2O4 Mn+7O4-+C+32O4-2→Mn+2+2C+4O2 ∴ 100 × 10-3 × 0.02 × 5 = x1282 ⇒ x = 0.64 g Eq. of KHC2O4 = Eq. of CaOH2 ⇒ y1281 = 100 × 10-3 × 0.05 × 2 (∵KHC2O4 contains only one replaceable Hydrogen, Bascity=1) ⇒ y = 1.28 g ∴ 2 x = y