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Give one chemical method for the preparation of flourine. |
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Answer» Solution :`F_(2)` can be prepared by the action of the Lewis acid antimony pentafluoride on potassium hexafluoromanganate (IV), `K_(2)MnF_(6)`. In this reaction, first the stronger Lewis acid `SbF_(5)` displaces the weaker acid `MnF_(4)` from its salt `(K_(2)MnF_(6))`. `MnF_(4)` being unstable, readil decomposes to give `MnF_(3) and F_(2)` `{:(2K_(2)MnF_(6)+4SbF_(5) rarr 4KSbF_(6) + 2 MnF_(4)),(""2 MnF_(4) rarr 2 MnF_(3) + F_(2)),(bar(2K_(2)MnF_(6)+4SbF_(5) rarr 4 KSbF_(6) + 2 MnF_(3) + F_(2))):}` |
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