acids and bases

WHAT ARE ACIDS?

Acids produce hydrogen ions in water.

Example of an acid (HA) in solution

A-H+

H+

A-

A-

H+

H+

A-

WHAT ARE BASES?

They are metal oxides or metal hydroxides.

Examples:

Sodium hydroxide (NaOH)

Copper (II) oxide (CuO)

Copper (II) Oxide

NaOH

Can you name some other examples of

bases?

SOLUBLE BASES

Soluble bases are called alkalis

Alkali dissolves in water to produce hydroxide (OH-) ions

Example:

NaOHNa+

OH-

Na+

OH-

Na+

OH-

Na+ OH-

WHAT HAPPENS WHEN ACID REACTS WITH A

BASE?

Let us visualize the changes that takes place on the molecular level!

Click me

ACID AND BASE REACTION

The reaction between an acid and a base is called neutralisation.

Example 1:

Sodium hydroxide + hydrochloric acid Sodium chloride + water

Now, let’s write the chemical equation!NaOH + HCl NaCl + H2O

ACID AND BASE REACTION

Example 2

Copper (II) oxide + sulfuric acid copper(II) sulfate + water

Now, let’s write the chemical equation!CuO + H2SO4 CuSO4 + H2O

SUMMARY: NEUTRALISATION

REACTION Acid + Base Salt + water

Ionic Equation:

H+ (aq) + OH- (aq) H2O (l)

CAN YOU ALSO… DRAW YOUR OWN CONCEPT

MAP!?!Group leaders:

•Create a mindmap on mindmeister •Invite your group mates

All members of the group:

•Contribute to the concept map •Post the finalized copy of concept map onto your pbwiki group

THE END…