Advertisements
Advertisements
Question
How is leaching carried out in case of low grade copper ores?
Advertisements
Solution
In the case of low-grade copper ores, leaching is carried out using acid or bacteria in the presence of air. In this process, copper goes into the solution as Cu2+ ions.
\[\ce{Cu_{(s)} + 2H^+_{ (aq)} + \frac{1}{2}O2_{(g)} -> Cu^{2+}_{ (aq)} + 2H2O_{(l)}}\]
The resulting solution is treated with scrap iron or H2 to get metallic copper.
\[\ce{Cu^{2+}_{ (aq)} + H2_{(g)} -> Cu_{(s)} + 2H^+_{ (aq)}}\]
RELATED QUESTIONS
What is the significance of leaching in the extraction of aluminium?
How can you separate alumina from silica in a bauxite ore associated with silica? Give equations, if any.
Write the chemical reactions involved in the process of extraction of Gold. Explain the role of dilute NaCN and Zn in this process.
What is the role of dilute NaCN in the extraction of gold ?
Which reducing agent is employed to get copper from the leached low-grade copper ore?
The common impurity present in most of the ores is ____________.
Common impurities present in bauxite are:
(i) \[\ce{CuO}\]
(ii) \[\ce{ZnO}\]
(iii) \[\ce{Fe2O3}\]
(iv) \[\ce{SiO2}\]
The process of converting hydrated alumina into anhydrous alumina is called
In Baeyer's process, the leaching of alumina is done by using ______
Gold is extracted by making soluble cyanide complex. The cyanide complex is ______.
Which of the reaction is suitable for concentrating ore by leaching process?
