fluoride can be extracted from this by dehydration.its tetrahydrate is formed by dissolving cobalt(ii) in hydrofluoric acid. other synthesis can occur at higher temperatures. cobalt(ii) fluoride (cas no. - - ) can be prepared from cobalt(ii) oxide or anhydrous cobalt(ii) chloride in a stream of hydrogen...
. in some processes hydrogen fluoride is removed from hydrogen by passing the gases through sodium or potassium hydroxide solution: the hf content can be reduced to approximately % by volume in the fluorine gas, by treatment with sodium fluoride: the electrolyte is replenished by the addition of anhydrous...
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