Metal deficiency defect is shown by Fe0.93O. In the crystal, some Fe2+ cations are missing and loss of positive charge is compensated by the presence of Fe3+ ions. The percentage of Fe2+ ions in the Fe0.93O crystals is __________. (Nearest integer)
Answer (integer)
85
Solution
$\mathrm{Fe}_{0.93} \mathrm{O}$
<br/><br/>
Let the number of $\mathrm{O}^{-2}$ ions be 100 and the number of $\mathrm{Fe}^{+2}$ ions be $\mathrm{X}$ The number of $\mathrm{Fe}^{+3}$ ions be $(93-\mathrm{X})$
<br/><br/>
$$
\begin{aligned}
&\therefore \,X(2)+(93-X) 3=200 \\\\
&279-X=200 \\\\
&X=79 \\\\
&\therefore \quad \% \text { of } F^{+2} \text { ions } =\frac{79}{93} \times 100 \\\\
&\simeq 85 \%
\end{aligned}
$$
About this question
Subject: Chemistry · Chapter: States of Matter · Topic: Gas Laws
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