Consider the complex ion [Cr(NH3)2 Cl2(C2 O4)]^-. a. What is the oxidation state of the metal at

step 1 So here we are looking at a complex. And so the oxidation number of our chromium, which is our c

Consider the complex ion [Cr(NH3)2 Cl2(C2 O4)]^-. a. What is...

Consider the complex ion $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right]^{-}$. a. What is the oxidation state of the metal atom? b. Give the formula and name of each ligand in the ion. C. What is the coordination number of the metal atom? d. What would be the charge on the complex if all ligands were chloride ions?

Consider the complex ion $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)\right]^{-}$.
a. What is the oxidation state of the metal atom?
b. Give the formula and name of each ligand in the ion.
C. What is the coordination number of the metal atom?
d. What would be the charge on the complex if all ligands were chloride ions?

Key Concepts

Oxidation State Determination

This concept involves calculating the oxidation state of the metal center in a coordination complex by taking into account the overall charge of the complex and the known charges of the coordinated ligands. It requires setting up an equation where the sum of the oxidation state of the metal and the total charges contributed by the ligands equals the overall charge of the complex.

Ligands and Their Identification

This refers to recognizing the atoms or groups attached to the central metal ion, including understanding their formulas, names, and charges. The process involves identifying neutral ligands (like ammonia) and anionic ligands (such as chloride and oxalate), as well as recognizing the denticity of each ligand, which influences the bonding to the metal.

Coordination Number

The coordination number is the number of donor atoms from ligands that are directly bonded to the central metal ion. It is determined by counting the number of coordination sites occupied by the ligands, considering their denticity, and is a key factor in predicting the geometry and stereochemistry of the complex.

Charge Calculation of Complexes

This concept focuses on determining the overall charge of a coordination complex by summing the individual oxidation state of the metal and the charges contributed by all the ligands. It is used to predict how changes in the set of ligands (such as substituting them with others of different charge) will affect the overall charge of the complex.

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