Question

Define refining of copper with diagram, procedure, observation.

Answer 1

it can be refined and made very pure up to 99.999%. Pure copper is important in making electrical wire, because copper's electrical conductivity is reduced by impurities.
Extraction of Copper Purification by Electrolysis.
High purity copper is needed to make electrical wires.
Purification of Copper by Electrolysis.

The anode is a block of impure copper.
The cathode is a thin piece of pure copper.
The electrolyte is copper sulfate.
When electricity is passed through the cell.
copper is dissolved at the anode by oxidation
and Cu2+ ions go into solution.

Cu(s) - 2e- ---> Cu2+(aq)

At the cathode, copper is deposited by reduction.

Cu2+(aq) + 2e- -----> Cu(s)

As copper ions move from the anode to the cathode
the anode gets smaller as the cathode gets bigger.
This is a redox reaction