AAT Bioquest

How do I use pH to calculate a concentration?

Posted March 22, 2023


pH can be used to calculate a concentration by using the equation pH= -log [H+]. For example, for calculating the hydrogen ion concentration of a solution with a pH of 5.5, one should rewrite the formula to solve for concentration.  [H+] concentration can be solved by rewriting the formula as  [H+]= 10^-pH. Thus,  [H+]= 10^-5.5, and equals 0.0000031622.

Additional resources

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