The oxidation number of Fe and S in iron pyri | vedclass

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Question

(A) Iron pyrites is $FeS_2$. Let the oxidation number of $Fe$ be $x$ and $S$ be $y$. For $FeS_2$,the compound is composed of $Fe^{2+}$ and $S_2^{2-}$

Vedclass · Accepted Answer

$+2, -1$

Vedclass · Answer

(A) Iron pyrites is $FeS_2$. Let the oxidation number of $Fe$ be $x$ and $S$ be $y$. For $FeS_2$,the compound is composed of $Fe^{2+}$ and $S_2^{2-}$ ions. In the disulfide ion $S_2^{2-}$,the oxidation state of each $S$ atom is $-1$. Substituting this into the equation: $x + 2(-1) = 0$. $x - 2 = 0 \Rightarrow x = +2$. Thus,the oxidation number of $Fe$ is $+2$ and $S$ is $-1$.

The oxidation number of $Fe$ and $S$ in iron pyrites are

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