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Question
What flux would you use to remove the following impurity?
CaO
Very Short Answer
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Solution
The impurity CaO (lime/quicklime) is basic in nature. To remove it, we use an acidic flux, such as SiO2 (silica).
\[\ce{CaO + SiO2 -> CuSiO3}\]
So, the flux used to remove CaO is SiO2 (acidic flux).
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Chapter 6: General Principles and Processes of Isolation of Elements - REVIEW EXERCISES [Page 354]
