Chemistry Form 4 Chapter 6-Electrochemistry

1.  RELATE THE
PRESENCE OF FREELY
MOVING IONS TO
ELECTRICAL
CONDUCTIVITY
CLASSIFY
SUBSTANCES INTO
ELECTROLYTES AND
NON- ELECTROLYTES
STATE THE
MEANING OF
ELECTROLYTES

2. Electrolyte:
A substance that conduct electricity in molten
state@aqueous solution and undergo chemical
changes.
Ionic compounds in molten state@in aqueous
solution are electrolytes because these substances
contain freely moving ions
Electrolysis:
 A process whereby compounds in
molten @aqueous states are broken down
into their constituent element by passing
electric through them
Non-electrolytes:
A substance that cannot conduct
electricity either in molten state @aqueous
solution.
Covalent compound are non electrolytes
which contains molecule and no freely
moving ion.

3. E
Electrolyte Non-electrolyte
• molten aluminium oxide • solid lead(ii) chloride
• lead(ii) nitrate solution • glucose solution
• sodium chloride solution • glacial ethanoic acid
solid lead(ii)chloride , molten aluminium chloride , lead (ii)nitrate solution ,
glucose solution , sodium chloride solution , glacial ethanoic acid
CLASSIFY THE SUBSTANCES

4. Electrical
conductivity
Electrolyte
Non-electrolyte