What is the pH of 10⁻1 mol/dm³ sodium hydroxide at 25 °C?
Answer and explanation
Correct answer: C. 13
- Step 1: [OH⁻] = 10⁻1, so pOH = 1. Step 2. pH = 14 − 1 = 13. Answer: 13. Why not the others: 1 is what you get if you treat it as an acid of the same concentration. 8 is what you get if you add n to 7. 15 is what you get if you add n to 14.
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