Question

how will you extract mercury from its copper and ore from copper sulphide?​

Answer 1

Answer:

This turns HgS [mercury sulphide or cinnabar] into HgO (mercury oxide); by liberation of sulphur dioxide. Mercury oxide so obtained is again heated strongly. This reduces mercury oxide to mercury metal. Extraction of copper metal: Copper glance (Cu2S) is roasted in the presence of air.

Explanation:

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Answer 2

Answer:

Metals low in activity series like copper are very unreactive. The oxides of these metals can be reduced to metals by heating alone. Copper is found as Cu

2

S in nature. It can be formed just heating it in air.

2Cu

2

S+3O

2

Heat

2Cu

2

O+SO

2

↑

2Cu

2

O+Cu

2

S

Heat

6Cu+SO

2

↑

Then electrolytic refining of copper is carried out to remove the rest of the impurities present in the ore. The impure copper is made anode and strip of pure copper are made cathode. On passing the current as shown in the diagram, the pure copper from the anode dissolves into an electrolyte. An equivalent amount of copper is deposited on the cathode. Soluble impurities remain in the solution, whereas insoluble impurities settle at the bottom of the anode.

solution