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
How is copper extracted from low grade copper ores?
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Answer
Copper is extracted by hydrometallurgy from low grade ores. It is leached out using acid or bacteria. The solution containing copper ions $(Cu^{+2})$ is treated with scrap iron, zinc or $H_2$ as:
$\text{Cu}^{2+}(\text{aq})+\text{H}_{2}(\text{g})\ \xrightarrow{\ \ \ \ \ \ \ }\text{Cu}(\text{s})+2\text{H}^{+}(\text{aq})$
$\text{Cu}^{2+}(\text{aq})+\text{Fe}(\text{s})\ \xrightarrow{\ \ \ \ \ \ \ }\text{Cu}(\text{s})+\text{Fe}^{+2}(\text{aq})$
In this way, copper, is obtained.
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