(C) Fluorine is prepared by the electrolysis of a fused mixture of $KHF_2$ and $HF$ (Moissan's method). The reactions are as follows: $KHF_2 \to KF +

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(C) Fluorine is prepared by the electrolysis of a fused mixture of $KHF_2$ and $HF$ (Moissan's method). The reactions are as follows: $KHF_2 \to KF + HF$ $KF \to K^+ + F^-$ At cathode: $2K^+ + 2e^- \to 2K$; $2K + 2HF \to 2KF + H_2$ At anode: $2F^- \to F_2 + 2e^-$