12.5 mL of a solution containing 6.0 g of a dibasic acid in I L was found to be neutralized by 10 mL of a decinormal solution of NaOH. The molecular weight of the acid is
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a
150
b
120
c
110
d
75
answer is A.
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Detailed Solution
Dibasic acid ≡ NaOH 1.5 mL 10 mL x 0.1 N = 1 mEqStrength of dibasic acid = 6 g L-1mEq of acid = mEq of NaOH12.5×N=1mEq12.5×6×1000Mw2×1000=1∴Mw( acid )=150