Q. 45.0( 6 Votes )
What are the different methods for the refining of metals?
The different methods of refining are -
i. Liquation –
The process of separating low melting metals from high melting impurities by providing temperature required for pure metal to flow down leaving behind impurities.
Examples: refining of tin and lead.
The diagram is shown below:
ii. Distillation – process where impure metal is heated to vaporise the low boiling metal leaving behind impurities and condensing the vapour to get pure metal.
Example: refining of zinc , cadmium, mercury
iii. Electrolytic refining – The process of electrolysis of metal-salt solution where pure metal is used as cathode and impure metal is used as anode.
Example – copper and silver are refined using this method.
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What are the different methods for the refining of metals?Kerala Board Chemistry Part II