Question

What is cinnabar ? How is metal extracted from cinnabar ?Explain briefly with Chemical equations

Answer 1

Answer:

Cinnabar is the sulphide ore of Mercury.

Explanation:

Processof extraction of Mercury (Hg) from its sulphide ore Cinnabar (HgS) is as follows:

1. Cinnabar ore is mined in its concentrated form.
2. It is crushed in a cone crusher.
3. Powdered form of the ore is heated at 300 degree Celcius.
4. Roasting process is carried out, where combustion reaction occurs in the presence of oxygen.
5. Finally, Sulphur dioxide is formed and Mercury vapour is evolved.
6. Mercury vapour is then passed through a condenser and liquid form of mercury is collected.
7. Finally, the liquid mercury is refined to remove impurities.

Chemical equation:

HgS + O2 → Hg + SO2

Mercury is a metal obtained in liquid form which is also known as Quick silver.

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Answer 2

Explanation:

Cinnabar (HgS) is an ore of mercury. when Cinnabar, HgS is heated in air, it is first converted into HgO, HgO is then reduced to Hg on further heating

Detailed answer:

Cinnabar (HgS) is an ore of Mercury. The metals being less reactive can be obtained by reducing their oxides to metals by heating alone. So, when Cinnabar is heated in air, it first changes into its oxide and then into mercury metal.

HgS+O2 ----> Hg + SO2

This process is also called Roasting. However Mercury can be obtained from other reactions too. For ex:

HgS + Fe = Hg + FeS

4HgS + 3 CaO = 4Hg + 3CaS + CaSO

Cinnabar refers to the common bright scarlet to brick-red form of mercury(II) sulfide, formula HgS, that is the most common source ore for refining elemental mercury, and is the historic source for the brilliant red or scarlet pigment termed vermilion and associated red mercury pigments.

To produce liquid mercury (quicksilver), crushed cinnabar ore is roasted in rotary furnaces. Pure mercury separates from sulfur in this process and easily evaporates. A condensing column is used to collect the liquid metal, which is most often shipped in iron flasks.

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