General Principles and Processes of Isolation of Elements — Chemistry STD 12 Science — Question
Gujarat BoardEnglish MediumSTD 12 ScienceChemistryGeneral Principles and Processes of Isolation of Elements2 Marks
Question
Copper can be extracted by hydrometallurgy but not zinc. Explain.
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Answer
Hydro metallurgy method is based on the fact that more electropositive metals displace less electro positive metals from their salt solution. Copper is precipitated from copper sulphate solution by adding iron.
$\text{CuS}\text{O}_4+\text{Fe}\rightarrow\text{FeS}\text{O}_4+\text{Cu}\downarrow$
But Zinc is not precipitated from zinc sulphate solution by adding iron. Hence copper can be extracted by hydro metallurgy but not zinc.
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