How can I calculate pH of NaOH?

A pH lower than 7 is acidic, while a pH higher than 7 is alkaline. In mathematical terms, pH is the negative logarithm of the molar concentration of hydrogen ions in the solution.

To calculate pH, apply the formula pOH = -log[OH-].

-log[0.1] = 1.

Next, apply the formula pH + pOH = 14.

To isolate the pH, 14 – 1 = 13.

The pH of your NaOH solution is 13.

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