Chemistry
pH
Calculate pH from hydrogen ion concentration.
pH = -log₁₀[H⁺]
Formula Explanation
For dilute aqueous solutions, pH is commonly introduced as the negative base-10 logarithm of hydrogen ion concentration.
Variables Explained
[H⁺] = Hydrogen ion concentration in mol/L.
Solved Example
Find pH when [H⁺] = 1 × 10⁻³ mol/L.
pH = -log₁₀(10⁻³) = 3.