Hi everybody, Please forgive my question which is probably very obvious, but why are acids based on H ion concentration? Why is HCl a strong acid whereas LiCl is a salt. Both H and Li form + ions in solution. Conversely, why are OH- bases? Why cant NaCl be a strong base? I'm sure the answer is a simple one, however I have found no where that explains why. Why are hydrogen ions so reactive? Thanks.