How can I calculate the pH of a solution?

1 Answer
Ernest Z.
Jul 28, 2014

You take the negative logarithm of the hydrogen ion concentration.

pH = = -log[H⁺] = -log[H₃O⁺]

EXAMPLE

Calculate the pH of a solution in which [H₃O⁺] = 1.4 × 10⁻⁵ mol/L

Solution

pH = -log(1.4 × 10⁻⁵) = 4.85

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