15   mL of aqueous solution of Fe 2 + in acidic medium completely reacted with 20   mL of 0 . 03…

15 mL of aqueous solution of Fe2+ in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr2O72-. The molarity of the Fe2+ solution is _______ ×10-2M (Round off to the Nearest Integer).

Solution

neqFe2+=neqCr2O72-

or 15×MFe2+1000×1=20×0.031000×6

∴MFe2+=0.24M=24×10-2M

Asked in: JEE Main 2021 (17 Mar Shift 1)

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