Process pH strong-acid worksheet calculator

Calculate ideal hydrogen concentration and ideal pH at25°C with your own figures.

Your numbers

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Use ideal hydrogen concentration and ideal pH at25°C to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Dilute strong monoprotic acid concentration (mol/L)
0.001
Approved model acid: 0 HCl; 1 HNO3
0
Ideal hydrogen concentration (mol/L)
0.001
Ideal pH at25°C
3

Try another scenario

Dilute strong monoprotic acid concentration (mol/L)
0.0011
Approved model acid: 0 HCl; 1 HNO3
0
Ideal hydrogen concentration (mol/L)
0.0011
Ideal pH at25°C
2.958607
Calculation method

Calculation method

Ideal hydrogen concentration (mol/L)

(acid concentration+sqrt(acid²+4Kw))/2, Kw=1e−14 at25°C; activity coefficients ignored.

Ideal pH at25°C

−log10(hydrogen concentration), full monoprotic dissociation assumed.

Symbols and units
a
Dilute strong monoprotic acid concentration (mol/L)
b
Approved model acid: 0 HCl; 1 HNO3

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Assumptions & limits

Assumptions & limits

  • Ideal dilute aqueous HCl or HNO3 at25°C, at most0.01mol/L. No acid mixing, concentrated solutions, activity or handling advice. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Dilute strong monoprotic acid concentration (mol/L): minimum 0, maximum 0.01. Approved model acid: 0 HCl; 1 HNO3: minimum 0, maximum 1.
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