$20 \mathrm{~mL}$ of $0.02 \,\mathrm{M} \,\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$ solution is used for the titration of $10 \mathrm{~mL}$ of $\mathrm{Fe}^{2+}$ solution in the acidic medium.
The molarity of $\mathrm{Fe}^{2+}$ solution is __________ $\times \,10^{-2}\, \mathrm{M}$. (Nearest Integer)
Answer (integer)
24
Solution
Applying the law of equivalence, milliequivalents of $\mathrm{Fe}^{2+}=$ milliequivalents of $\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$
<br/><br/>
$$
\begin{aligned}
&10 \times 1 \times M=20 \times 6 \times .02 \\\\
&M=24 \times 10^{-2} M
\end{aligned}
$$
<br/><br/>
$\therefore $ Answer will be 24
About this question
Subject: Chemistry · Chapter: Some Basic Concepts of Chemistry · Topic: Mole Concept
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