pH of a 1×10⁻⁴ mol/L Acid
An acid solution with [H⁺] = 0.0001 mol/L has a pH of 4.
How to use this tool
- Enter h⁺ concentration [h⁺] in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your ph and the full breakdown beneath it.
Find the pH when the hydrogen ion concentration is 1×10⁻⁴ mol/L, typical of weak acid solutions.
Frequently asked questions
- What everyday substances have known pH values?
- Lemon juice ~2, coffee ~5, pure water 7, baking soda ~9, bleach ~12.
- Does pH change with temperature?
- Yes. Pure water at 25 °C has pH 7, but at 100 °C it has pH ~6.1 — still neutral because both H⁺ and OH⁻ concentrations rise equally.