Separation of sodium fluoride from sodium chloride
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How can sodium fluoride be separated from a mixture of sodium fluoride and sodium chloride solutions? What is the approximate purity of the sodium fluoride obtained after separation?
You can give it a try, freeze crystallization. The solubilities of sodium fluoride and sodium chloride differ significantly.
The respective concentrations can be adjusted to cause the other to crystallize out, with a purity of over 95%.
This post was last edited by shiqin778 on 2021-9-26 at 16:28. It’s not worth it; the solubility of sodium fluoride is quite low to begin with, and if sodium chloride is used in a dilute concentration, its purity can still be very high.