hydrogen fluoride in neat (no solvent) byproducts: KF, H2O; dry, neutral K2SO4 applied;

in ammonia from NH4FSO4 sol. of concd. NH3 with water, mixing with excess concd. aq. KOH soln.;

in water excess KOH, aq. soln.;;

in neat (no solvent) react. of SO3-vapor with KBF4 (dried at 200°C, finely powdered) at about 35°C, evaporation of an excess of SO3, solidifying of KBF4*4SO3, decompn. at 80°C, heating for 2.5 hours to 120 up to 130°C;;

in further solvent(s) in BrF3, SO3:K2SO4 = 1:1 mol;

in neat (no solvent) heating under > 200 hPa SO2;

potassium fluoride

in ethanol alc. KOH; formation of KSO3F; further influence of acid or base causes formation of H2SO4;; evapn.;;

in neat (no solvent) byproducts: K2S2O8, H2O; F2, HF and dry K2SO4;;

in neat (no solvent) stirring complex salt in flask; evacuation; introduction of SO3 vapour in stages; keeping reactants in contact for 15-20 mins after addn. of last aliquot of SO3; cooling with liquid N2, then with alcohol bath at -50°C; apparatus described;; warming to room temp.; evacuation for about 6 h; filling with dry N2; repeated washing of solid fluorosulphate with dry ether; drying under vac.; detn. by IR, 19F-NMR; elem. anal.;;