The oxidation states of iron atoms in
compounds (A), (B) and (C), respectively, are x,
y and z. The sum of x, y and z is ________.
Na4[Fe(CN)5(NOS)]
(A)
Na4[FeO4]
(B)
[Fe2(CO)9]
(C)
Answer (integer)
6
Solution
Na<sub>4</sub>[Fe(CN)<sub>5</sub>(NOS)]
<br><br>Let the O.S. of Fe be x
<br><br>OS of CN = –1
<br>OS of NOS = –1
<br><br>$\therefore$ (+1)4 + x + (–1)5 + (–1)1 = 0
<br><br>$\Rightarrow$ x = +2
<br><br>Na<sub>4</sub>[FeO<sub>4</sub>]
<br><br>Let O.S. of Fe be y
<br><br>(+1)4 + y + (–2)4 = 0
<br><br>$\Rightarrow$ y = +4
<br><br>[Fe<sub>2</sub>(CO)<sub>9</sub>]
<br><br>Let O.S. of Fe be z
<br><br>2z + 0 × 9 = 0
<br><br>$\Rightarrow$ z = 0
<br><br>so (x + y + z) = +2 + 4 + 0 = 6
About this question
Subject: Chemistry · Chapter: Coordination Compounds · Topic: Ligands and Coordination Number
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