pH Calculator

Your details

Choose how you want to calculate pH.
Molar concentration of H+ ions, e.g. 0.0001 for 1x10-4 mol/L.
mol/L
pHAcidic
4
pOH10
[H+] concentration0.0001mol/L
[OH-] concentration0mol/L
4
Strongly acidic<3Acidic3-6.5Neutral6.5-7.5Basic7.5-11Strongly basic11+

A pH of 4.00 is acidic.

  • The pH scale is logarithmic: each whole unit represents a tenfold change in [H+].
  • [H+] = 1.000e-4 mol/L, [OH-] = 1.000e-10 mol/L.
  • pH + pOH = 14 at 25 degrees C (standard temperature and pressure).

Next stepUse the Henderson-Hasselbalch buffer mode to model a weak acid and its salt together.

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