What is the pH of a Strong Acid Calculator?
This tool computes the pH of a strong acid solution that dissociates completely in water. Strong acids such as HCl, HNO₃, and H₂SO₄ release all of their acidic protons, so the hydrogen-ion concentration equals the acid concentration multiplied by the number of acidic protons per molecule.
How to use it
Enter the molar concentration of the acid in mol/L and the number of acidic protons (n_H): 1 for monoprotic acids like HCl, 2 for diprotic acids like H₂SO₄. The calculator returns the pH, the hydrogen-ion concentration [H⁺], and the pOH.
The formula explained
For a strong acid, [H^+] = C × n_H because dissociation is complete. The pH is the negative base-10 logarithm of that concentration:
Worked example
For 0.01 mol/L HCl (n_H = 1): [H^+] = 0.01\ mol/L,
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