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Question
What flux would you use to remove the following impurity?
FeO
Very Short Answer
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Solution
The impurity FeO (ferrous oxide) is basic in nature. To remove it, an acidic flux such as SiO2 (silica) is used.
\[\ce{FeO + SiO2 -> FeSiO2}\]
So, the flux used to remove FeO is SiO2 (acidic flux).
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Chapter 6: General Principles and Processes of Isolation of Elements - REVIEW EXERCISES [Page 354]
