   Chapter 22, Problem 23PS

Chapter
Section
Textbook Problem

Give the oxidation number of the metal ion in each of the following compounds.(a) [Mn(NH3)6]SO4(b) K3[Co(CN)6](c) [Co(NH3)4Cl2]Cl(d) Cr(en)2Cl2

(a)

Interpretation Introduction

Interpretation: The oxidation number of the metal in the given compound has to be determined.

Concept introduction:

Coordination compounds: The compounds having coordination covalent bonds which form when metal ions react with polar molecules or anions.

Ligands: The ions or molecules that forms coordination covalent bond with metal ions in a coordination compound. Ligands should have minimum one lone pair of electron, where it donates two electrons to the metal. Metal atom accepts the electron pair from a ligand forming a coordination bond.

Oxidation number: The total number of electrons in an atom after losing or gaining electrons to make a bond with another atom. It indicates the charge of an ion.

Explanation

(a)

Given compound is [Mn(NH3)6]SO4

Oxidation number ofNH3=0Oxidation number ofSO42=2

The charge of the complex is zero.

[Mn(NH3)6]2+SO42

Therefore,

(b)

Interpretation Introduction

Interpretation: The oxidation number of the metal in the given compound has to be determined.

Concept introduction:

Coordination compounds: The compounds having coordination covalent bonds which form when metal ions react with polar molecules or anions.

Ligands: The ions or molecules that forms coordination covalent bond with metal ions in a coordination compound. Ligands should have minimum one lone pair of electron, where it donates two electrons to the metal. Metal atom accepts the electron pair from a ligand forming a coordination bond.

Oxidation number: The total number of electrons in an atom after losing or gaining electrons to make a bond with another atom. It indicates the charge of an ion.

(c)

Interpretation Introduction

Interpretation: The oxidation number of the metal in the given compound has to be determined.

Concept introduction:

Coordination compounds: The compounds having coordination covalent bonds which form when metal ions react with polar molecules or anions.

Ligands: The ions or molecules that forms coordination covalent bond with metal ions in a coordination compound. Ligands should have minimum one lone pair of electron, where it donates two electrons to the metal. Metal atom accepts the electron pair from a ligand forming a coordination bond.

Oxidation number: The total number of electrons in an atom after losing or gaining electrons to make a bond with another atom. It indicates the charge of an ion.

(d)

Interpretation Introduction

Interpretation: The oxidation number of the metal in the given compound has to be determined.

Concept introduction:

Coordination compounds: The compounds having coordination covalent bonds which form when metal ions react with polar molecules or anions.

Ligands: The ions or molecules that forms coordination covalent bond with metal ions in a coordination compound. Ligands should have minimum one lone pair of electron, where it donates two electrons to the metal. Metal atom accepts the electron pair from a ligand forming a coordination bond.

Oxidation number: The total number of electrons in an atom after losing or gaining electrons to make a bond with another atom. It indicates the charge of an ion.

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