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15 April, 23:53

How to calculate hydrogen ion concentation from pH

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  1. 16 April, 02:20
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    pH - (log) [H+]

    Explanation:

    Find the Hydrogen ion concentration;

    then the logarithm of that concentration, and change the sign.

    If [H+] = 1 x / 10 to the negative 7 (moles per liter), the log of that is - 7, the opposite of that is 7

    Ergo, pH 7. IF the acid is very very concentrated, the pH can be negative. This was a very easy one I chose that you likely saw in class, but work on a few more, and it will be easy. When the acids are very very weak disassociation, you will need another, little bit harder equation. Just remember what pH is; "the opposite of the log of hydrogen (or Hydronium ion) concentration.
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