First slide

IUPAC Nomenclature

Question

The oxidation state of cobalt in the complex compound $[Co {({NH}_{3})}_{6}] {Cl}_{3}$ is

Easy

A

+ 3
B

+ 6
C

+ 5
D

+ 2

Solution

$\begin{array}{l} [Co {({NH}_{3})}_{6}] {Cl}_{3} \to {[Co {({NH}_{3})}_{6}]}^{3 +} + 3 {Cl}^{-} \\ x + (6) 0 = + 3 \Rightarrow x = + 3 \end{array}$

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