Well if I was wondering if we put HF into a glass of water the acid will be dissolved according to this reaction: HF->F- + H+ Now there is a proton travelling across the water.Why it is travelling is due to : all H20 molecules have equal chance of getting the proton so it travels through the liquid.Now for the reaction F- + H2O ->HF + OH- the bond strength between O and H is lower than the bond strength of F and H(fluorine is has more electronegativity and smaller atomic radius than O).According to Bronsted-Lowry theory for acids and bases the second happens more often than the first one.But how is this happening?The second reaction happen at all.Oxygen is more negatively charged than fluorine so the proton would have a very small chance to reach fluorine and then the electrons would be rearranged to form the HF bond.