Question

The composition of a sample of wustite is $F{e}_{0.93}{O}_{1.0}$. What percentage of iron is present in the form of Fe(III)?

• A. $12\%$
• B. $32\%$
• C. $25\%$
• D. $15\%$

Answer 1

The correct option is D $15\%$

Let the amount of Fe(III) be $x$ and Fe(II) be $1-x$.
So, according to given,
By charge balancing method

Charge on cation $=$ charge on anion

$3x+2(1-x)=\frac{2}{0.93}$

$⟹x=0.1505$

Percentage of Fe(III) $=15\%$