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20 mL of 0 . 02 MK 2 Cr 2 O 7 solution is used for the titration of 10 mL of Fe 2 + solution in the acidic medium. The molarity of Fe 2 + solution is____ × 10 - 2 M

Correct answer

0

Step-by-step solution

Equivalents of K 2 Cr 2 O 7 = Equivalents of Fe 2 + ⇒ (Molarity × volume × n . f ) of K 2 Cr 2 O 7 = (molarity × volume × n . f ) of Fe 2 + n . f = n - factor ( valence   factor ) ⇒ 0 . 02 × 20 × 6 = M × 10 × 1 ⇒ M = 0 . 24 ⇒ Molarity = 24 × 10 - 2

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