pH Scale
Interactive simulation — adjust parameters and watch the visualization update in real time.
Indicator view
7.00
Neutral
0 acid714 base
How it works
The **pH** scale measures hydrogen-ion activity in water-based solutions. **pH 7** is neutral at 25 °C. Lower pH means **more acidic** (higher [H⁺]); higher pH means **more basic**. Colors mimic a **universal indicator** — real lab measurements use calibrated probes or dyes.
Key equations
pH = −log₁₀[H⁺] · pOH = −log₁₀[OH⁻] · pH + pOH ≈ 14