Chemistry Learning Tool

pH Solver

Convert pH, solve weak acid/base equilibria, and estimate buffer pH.

Explore the relationships among pH, pOH, hydrogen ion concentration, hydroxide ion concentration, strong electrolytes, weak equilibria, and classroom buffer estimates.

Calculator Controls

Choose a mode, enter values, and the result updates live.

Results

Enter values to calculate pH.

pH

—

Waiting

pOH

—

[H+]

—

[OH-]

—

Visual pH Scale

Pointer clamps between 0 and 14 while the numeric result stays exact.

Warnings

  • No warnings.

Step-by-Step

  1. Enter values to see the chemistry steps.

Extra Details

  • Calculated details like percent ionization and buffer ratio appear here.

What This Tool Covers

pH Solver is for educational and informational use. It assumes ideal dilute aqueous solutions and simplified equilibrium models.

Assumptions and Limits

  • Weak acid/base mode handles monoprotic systems only.
  • Buffer mode uses the Henderson-Hasselbalch approximation.
  • The calculator does not model activity coefficients or ionic strength corrections.
  • Very dilute systems may require water autoionization corrections.
  • The H2SO4 preset uses a simplified classroom approximation.

FAQ

What is pH?
pH is the negative base-10 logarithm of the hydrogen ion concentration in solution.
How do I convert [H+] to pH?
Enter the concentration in Conversion mode and the app applies pH = -log10([H+]).
Can pH be below 0 or above 14?
Yes. The app warns when the value is outside the usual classroom scale, but it still calculates it.
What is the difference between a strong acid and a weak acid?
Strong acids are treated as fully dissociated, while weak acids are solved with an equilibrium model.
What approximation is used for buffers?
The buffer modes use the Henderson-Hasselbalch relationship for classroom-style estimates.