How to use the weak acid percent ionization calculator
Find the hydrogen ion concentration and percent ionization of a weak acid from its Ka and concentration. Enter acid dissociation constant, acid concentration in the fields above; the hydrogen ion concentration, percent ionization are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “percent ionization”, “weak acid dissociation percent”, “Ostwald dilution law”, “calculate weak acid percent ionization”, “find hydrogen ion concentration”.
Formula
Variables
- Ka — Acid dissociation constant
- C — Acid concentration (M)
Worked example
With acid dissociation constant = 1.8e-5, acid concentration = 0.1 M, the calculator gives hydrogen ion concentration ≈ 0.00134164 M; percent ionization ≈ 1.341641 %.
Frequently asked questions
What is the weak acid percent ionization calculator used for?
Find the hydrogen ion concentration and percent ionization of a weak acid from its Ka and concentration. It helps with questions such as “percent ionization”, “weak acid dissociation percent”, “Ostwald dilution law”.
What is the formula for the weak acid percent ionization calculation?
Hydrogen ion concentration (M) = √(Ka × C). Percent ionization (%) = 100 × √(Ka / C). Here Ka is acid dissociation constant, C is acid concentration (M).
What inputs do I need for the weak acid percent ionization calculator?
You need acid dissociation constant, acid concentration in M. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the weak acid percent ionization calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the weak acid percent ionization result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.