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).

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answer is 24.

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Detailed Solution

15×M1×1=20×0.03×6M1=0.24M=24×10−2M=0.24M

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