What is the pH of a mol/dm solution of the strong base NaOH at 25 °C?

Answer and explanation

Correct answer: A. 13

  1. Step 1: For NaOH , so .
  2. Step 2: .
Answer
13.
Why not the others: 1: that would be the pH of an acid of the same concentration. -1: the sign of the logarithm is not reversed. 15: it adds to 14 instead of subtracting.

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