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Concentration of [H+] ions in a solution

  1. May 15, 2010 #1
    Hey guys, just a quick question:

    If you have a solution of nitric acid, and if you were asked to find the concentration of H+ ions in the solution, would you find the concentration of H+ ions in the acid plus in the water?

    Re-wording of question: you find the moles of H+ ions in acid + plus, then divided by total volume (if asked for molarity).
     
  2. jcsd
  3. May 16, 2010 #2

    Borek

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    Staff: Mentor

    In general yes.

    See pH of strong acid (base) solution.

    In a diluted solution H+ from water dissociation is important, in more concentrated ones (that is, concentration higher than about 5x10-7) it can be safely ignored.

    In the case of nitric acid once its concentration gets close to 1M you have to remember it is not 100% dissociated, although at this stage ionic strength of the solution plays much more important role.
     
    Last edited by a moderator: Aug 13, 2013
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