CHAPTER 6

INTERACTION BETWEEN CHEMICALS

ElectrochemistryElectrochemistry

Content

6.16.1 ElectrolyteElectrolyte

Non-electrolyteNon-electrolyte

Relationship of freely moving ions in Relationship of freely moving ions in electrolyte and electrical circuitelectrolyte and electrical circuit

ConclusionConclusion

Electrolytes

• Definition: Substances that can conduct electricity when they are in molten state or aqueous solution and undergo chemical changes.

• Because they generally consist of ions in solution, electrolytes are also known as ionic solutes.

• Example: NaCl

Batteries

ammeter

+ -

0 10

electrolytes

Please notice what happen to the ammeter.

What made the needle of the ammeter moves?

Non- electrolytes

• Definition: A substances that cannot conduct electricity either in molten state or aqueous solution.

• Most covalent compound are non-electrolyte.

• Example: CCl4

Batteries

ammeter

+ -

0 10

Non-electrolytes

Please notice what happen to the ammeter.

Why the needle of the ammeter did not move?

The relationship of freely moving ions in electrolyte and electrical circuit

• When the electricity is flow to the electrode, positive ions are attracted to cathode and negative ions are attracted to anode.

• The flow of electrical charge carried by ions in electrolyte and electrons in the connected wire.

• The electrolyte which has freely moving ions is able to conduct electricity.

Batteries

ammeter

+ -

0 10

electrolytes

Please notice what happen to the ammeter.

What made the needle of the ammeter moves?

Freely moving ions

Conclusion

Electrolyte

Non-electrolyte

The relationship of freely moving ions in electrolyte and electrical circuit

Substances that can conduct electricity when tey are in molten state or aqueous

solution and undergo chemical changes.

Electrolyte

A substances that cannot conduct electricity either in molten state or

aqueous solution.

Non- electrolyte

The electrolyte which has freely moving ions is able to conduct electricity

The relationship of freely moving ions in electrolyte and electrical circuit