Acids and Bases

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Slide 26

Oxides

Acidic Oxides (Acid Anhydrides): When a covalent oxide dissolves in water an acidic solution forms.

OX bond is strong and covalent.

SO2, NO2, CO2, CrO3

Basic Oxides (Basic Anhydrides): When an ionic oxide dissolves in water a basic solution results.

OX bond is ionic.

K2O, CaO

Slide 27

Lewis Acids and Bases

Lewis Acid: electron pair acceptor

Lewis Base: electron pair donor

Lewis acid has an empty atomic orbital that it can use to accept an electron pair from a molecule that has a lone pair of electrons.

Lewis Lewis

acid base

Slide 28

Figure 14.13 The AI(H2O)63+ Ion