Question:

What is the oxidation state of CoCo in [Co(H2O)5Cl]2+? [Co(H_{2}O)_{5}Cl]^{2+}?

Updated On: Aug 22, 2023
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The Correct Option is B

Solution and Explanation

The correct answer is B:3
The oxidation state of H2O is 0, and that of Cl is -1. The overall charge on the compound is +2.
x+(5×0)+(1)=+2x+(5\times 0)+(-1)=+2
x=+3x=+3

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Concepts Used:

Coordination Compounds

A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.

Coordination entity:

A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.

Ligands:

A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.