Chapter 23, Problem 23.102P

(a)

Interpretation Introduction

Interpretation:

The coordination number of the given complex metal ion has to be calculated.

  $\left[Co{(en)}_{2}C{l}_2\right]Cl$

Concept introduction:

Coordination compounds act like electrolytes, they dissolve in water to yield charged species, the counter ions and the complex ion. Though, the complex ion itself does not dissociate. The “number of individual ions per formula unit” refers to the number of ions that would form per coordination compound upon dissolution in water.

Coordination number:

The coordination number is the number of ligand atoms bonded directly to the central metal ion in a complex ion.

(b)

Interpretation Introduction

Interpretation:

The oxidation number of the given complex metal ion has to be calculated.

  $\left[Co{(en)}_{2}C{l}_2\right]Cl$

Concept introduction:

Oxidation number: (Oxidation state) A number equal to the magnitude of the charge an atom would have if its shared electrons were transferred to the atom that attracts them more strongly.

Coordination number:

The coordination number is the number of ligand atoms bonded directly to the central metal ion in a complex ion.

(c)

Interpretation Introduction

Interpretation:

The number of individual ions per formula unit has to be calculated.

  $\left[Co{(en)}_{2}C{l}_2\right]Cl$

Concept introduction:

Coordination compounds act like electrolytes, they dissolve in water to yield charged species, the counter ions and the complex ion.  Though, the complex ion itself does not dissociate.  The “number of individual ions per formula unit” refers to the number of ions that would form per coordination compound upon dissolution in water.

Coordination number:

The coordination number is the number of ligand atoms bonded directly to the central metal ion in a complex ion.

(d)

Interpretation Introduction

Interpretation:

The mole of precipitated silver chloride has to be calculated.

  $\left[Co{(en)}_{2}C{l}_2\right]Cl$

Concept introduction:

Coordination compounds act like electrolytes, they dissolve in water to yield charged species, the counter ions and the complex ion.  Though, the complex ion itself does not dissociate.  The “number of individual ions per formula unit” refers to the number of ions that would form per coordination compound upon dissolution in water.

A precipitation reaction is a type of chemical reaction in which two soluble salts in aqueous solution combine and one of the products is an insoluble salt called a precipitate.