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Q.

20 mL of 0.02 M K2Cr2O7 solution is used for the titration of 10 mL of Fe2+ solution in the acidic medium.

The molarity of Fe2+ solution is ______ × 10-2 M. (Nearest Integer)

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answer is 24.

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Detailed Solution

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Eq. of K2Cr2O7=Eq. of Fe2+

⇒ Molarity × volume × n.f) of K2Cr2O7=      ( molarity × volume × n.f ) of Fe2+⇒0.02×20×6=M×10×1⇒M=0.24⇒ Molarity =24×10−2

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20 mL of 0.02 M K2Cr2O7 solution is used for the titration of 10 mL of Fe2+ solution in the acidic medium.The molarity of Fe2+ solution is ______ × 10-2 M. (Nearest Integer)