Chem 6ASlide Set #14

2013-10-301

Overview

CHAPTER 6

Ionic Bonding

Ionic Compounds

Electron Configuration of Ions

2

Ions With Noble Gas Configuration

Know the charges of these ions.

3

Ions With Noble Gas Configuration

Know the charges of these ions.

4

Ions of transition elements

Electrons with the highest n value are removed first.

E.g.:V: [Ar] 4s2 3d3 V2+: [Ar] 3d3

So the electrons that were first-in (4s2) are first-out when the ion is formed.

5

Electron pairing and magnetic properties

Paramagnetic: unpaired electron(s); attracted by a magnetic field

Diamagnetic: all electrons paired; very slightly repelled by magnetic field

Paramagnetic MnSO4·H2O is drawn between the poles of a magnet

6

18-Electron Rule

(Pseudo-Noble Gas Configuration)

Know the charges of these ions.

51

Sb5+

83

Bi5+

7

The Inert Pair Effect

Metals in Groups 13, 14, & 15 may show the inert-pair effect:

outer s electrons are especially stable, not necessarily lost when a cation forms.

Pseudo-noble-gas configuration

8

“Inert Pair” Ions

Know the charges of these ions.

9

Metals With 1, 2, or 3 Common Ion Charges

Know these common ions and their charges.

10

Problem

What is the formula of gallium selenide?

A) GaSe

B) Ga2Se

C) GaSe3

D) Ga3Se

E) Ga2Se3

F) Ga3Se2

G) Ga3Se4

11

Problem

What is the formula of vanadium(V) oxide?

A) VO5

B) V2O3

C) V2O5

D) V3O2

E) V5O

F) V5O2

G) V5O3

12

HOMEWORK

Read: Chapter 6, Sections 6-6 and 6-7

Textbook problems from the end of Chapter 6:6-2, 6-4, 6-6, 6-10, 6-14, 6-16, 6-24, 6-26, 6-30