Metal
ores Rocks containing metals or metal compounds
from which it is economic to extract metals are called ores.
2.
Extracting
metals from their ores involves three stages.
Mining and concentrating the ore.
Converting (reducing) the ore to the metal.
Purifying the metal.
3.
Converting
(reducing) ores to metals
Metals higher in the reactivity series
are more difficult to obtain from their ores than those
lower down.
4.
The
advantages and disadvantages of mining for metal ores
5.
Electrolysis
and electrolytes
Electrolysis
involves the decomposition of compounds by electrical energy.
The compound which is decomposed is called
an electrolyte.
The electric current enters and leaves
the electrolyte through
terminals called electrodes.
The electrode connected to the positive
of the battery is called the anode
and the electrode connected to the negative of the battery
is called the cathode.
