Bastardane Posted February 3, 2013 Share Posted February 3, 2013 Is it possible to have pure acid? I have a hard trouble understanding this concept. Acids are concentration of H+ and OH- or is the acids the actual acids such as HCl or HI and if one is a strong acid such as HCl can I have pure HCl without water. Link to comment Share on other sites More sharing options...
elementcollector1 Posted February 3, 2013 Share Posted February 3, 2013 You can have pure, anhydrous HCl, but it won't behave as an acid (as HCl is a gas dissolved in water). H2SO4 can be concentrated to 98.6% under standard conditions, and cannot be concentrated further due to disproportionation into sulfur oxides and water. Nitric acid can be concentrated to anhydrous, as far as I know. Acids are proton donors, in that they will donate an H+ to bases, who are proton acceptors (and thus the acid-base reaction). In short, depends on the acid. If it is a gas dissolved in water, such as HCl or HI, likely not: the compound will no longer behave as an acid. If the compound can be a liquid on its own, such as nitric and sulfuric acids, then yes, it can be made anhydrous. Link to comment Share on other sites More sharing options...
Enthalpy Posted February 4, 2013 Share Posted February 4, 2013 Nitric acid may contain little water but as it gets more concentrated, other NxOy compounds appear spontaneously. Phosphoric melts at +42°C, pure one seems to exist. Carboxylic acids? Link to comment Share on other sites More sharing options...
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