Verified Solution • 2025–26 Session moderate

QJEEM22Che127: JEE Main 2022 Chemistry - Class 11 JEEM22Che127 Solution: of solution is used for the titration of of solution in the…

20 mL20 \mathrm{~mL} of 0.02 M K2Cr2O70.02 \,\mathrm{M} \,\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} solution is used for the titration of 10 mL10 \mathrm{~mL} of Fe2+\mathrm{Fe}^{2+} solution in the acidic medium.

The molarity of Fe2+\mathrm{Fe}^{2+} solution is __________ × 10−2 M\times \,10^{-2}\, \mathrm{M} . (Nearest Integer)

Step-by-Step Verified Solution

Applying the law of equivalence, milliequivalents of Fe2+=\mathrm{Fe}^{2+}= milliequivalents of K2Cr2O7\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}

amp;10×1×M=20×6×.02amp;M=24×10−2M\begin{aligned}&10 \times 1 \times M=20 \times 6 \times .02 \\\\&M=24 \times 10^{-2} M\end{aligned}

∴\therefore Answer will be 24

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