H²+F²=2HF
2HF+CaO=H²O+CaF²
CaF²+2HCl=CaCl²+2HF
CaCl²+Ag²O=CaO+2AgCl
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H²+F²=2HF
2HF+CaO=H²O+CaF²
CaF²+2HCl=CaCl²+2HF
CaCl²+Ag²O=CaO+2AgCl