basic

pH after Mixing Two Strong-Acid Solutions Calculator

[H⁺]_final = (M₁·V₁ + M₂·V₂) / (V₁ + V₂); pH = −log₁₀[H⁺].

Compute the resultant pH after mixing two strong-acid solutions of arbitrary molarity and volume. Strong acids fully dissociate, so [H⁺]_final is just the total moles of H⁺ divided by the total mixed volume: [H⁺] = (M₁V₁ + M₂V₂)/(V₁ + V₂); pH = −log₁₀[H⁺]. Volumes are taken in litres.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

M
L
M
L

Results

Enter values and click Calculate to see results.
Was this helpful?

How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

[H⁺] = (M₁V₁ + M₂V₂) / (V₁ + V₂); pH = −log₁₀[H⁺].

In depth

Compute the resultant pH after mixing two strong-acid solutions of arbitrary molarity and volume. Strong acids fully dissociate, so [H⁺]_final is just the total moles of H⁺ divided by the total mixed volume: [H⁺] = (M₁V₁ + M₂V₂)/(V₁ + V₂); pH = −log₁₀[H⁺]. Volumes are taken in litres.