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| Blister copper is refined by an electrolytic process. Blister copper in the form of a large plate is made as anode. A thin plate of pure copper is cathode. A solution of CuSO4 is used as an electrolyte. The impure blister copper dissolves at the anode. During electrolysis pure copper is deposited in the form of pure copper at the cathode. | ||||
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REACTION
AT ANODE
|
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| At anode oxidation of copper takes place. | ||||
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Cu
® Cu+2 + 2e-
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REACTION
AT CATHODE
|
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| At cathode reduction of copper-ions takes place. | ||||
|
Cu+2
+ 2e- ®
Cu
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FOR
MORE DETAIL CLICK HERE
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|
ORE
|
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| Those minerals which are considered worth mining commercially form the extraction of one or more metals are known as ores. | ||||
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GANGUE
|
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| Ores mostly consists of a mixture of minerals with useless or worth less rocky materials which are called gangue. | ||||
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USES
OF LEAD
|
||||
It is used in the preparation of Tel (C2H5)4Pb
tetra ethyl lead which is used to increase the efficiency of
petrol. Lead
is also used in car batteries. Lead
is used in the manufacture of paints and pigments. Lead
is used in alloy formation such as "solder". Lead
is used in the glazing of pottery. |
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| WRITE THE NAME AND FORMULA OF THE IMPORTANT ORES OF IRON? | ||||
|
Heamatite
(Fe2O3)
Limonite
(2Fe2O3.3H2O)
Magnetite
(Fe3O4)
Iron
pyrite (FeS2) (fool’s gold) |
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| WHAT ARE THE IMPORTANT ORES OF COPPER? | ||||
|
Chalopyrite
(CuFe2S3)
Copper
glance (CuS)
Malachite
(CuCO3.Cu(OH)2)
Chalcocite
(Cu2S)
Cuprite
(Cu2O) |
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| WRITE THE NAMES OF IMPORTANT ORES OF Zn? | ||||
|
Zinc blende
(ZnS) Zincite (ZnO) Smithsonite (ZnCO3) |
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|
SLAG
|
||||
| Slag is the by-product of the extraction of iron. Slag is a mixture of calcium silicate and calcium aluminate. It is used in the manufacture of cement and building materials | ||||
| WRITE THE FORMULA OF THE FOLLOWING? | ||||
|
Galena
Cerussite
Anglesite
Whitelead
pigment
Alumina
|
PbS
PbCO3 PbSO4 Pb3(OH)2(CO3)2 Al2O3 |
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