What is inaccurate about describing a solution as containing or using free hydrogen atoms?

Answer: An aqueous solution will contains both hydrogen ion and hydroxide ion. An here we are talking about free hydrogen ions, which means the description will be related to the pH. If the ratio of ion are equal then the pH will be 7 i. e. neutral. But if there are free hydrogen atoms in the solution we have, the pH of solution will be less than 7 and the solution will be described ad acidic. So the inaccurate description for a solution containing free hydrogen ion is that it is basic in nature.