Calculate PH of Low Concentrations Strong Acids
Calculating the pH of low concentrations of strong acids is crucial in various scientific and industrial applications. This calculator helps you determine the pH of solutions containing strong acids like HCl, H2SO4, and HNO3 at low concentrations.
- Enter the concentration of the acid in moles per liter (M).
- Select the acid from the dropdown menu.
- Click the “Calculate” button.
The pH of a solution is calculated using the formula:
pH = -log10[H+]
where [H+] is the hydrogen ion concentration, which can be calculated using the formula:
[H+] = Ka * [A-] / [HA]
where Ka is the acid dissociation constant, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the undissociated acid.
| Acid | Ka (25°C) |
|---|---|
| HCl | 1.0 x 10^-7 |
| H2SO4 | 1.2 x 10^-2 |
| HNO3 | 2.0 x 10^-3 |
- Always use the correct acid dissociation constant (Ka) for the temperature of your solution.
- For polyprotic acids like H2SO4, consider the degree of dissociation for accurate pH calculations.
What is the pH scale?
The pH scale is a logarithmic measure of the acidity or basicity of an aqueous solution. It ranges from 0 to 14, with 7 being neutral.
Learn more about acid rain from EPA