Question

MCQ : For an aqueous solution at 25°C pH + pOH is

  • Category: Acids Bases and Salts
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Answer

Question

For an aqueous solution at 25°C, pH + pOH is

  1. 10
  2. 7
  3. 12
  4. 14

Answer

14

Explanation

For an aqueous solution at 25°C, pH + pOH = 14. This is because pH is defined as -log[H+] and pOH is defined as -log[OH–], and the product of [H+] and [OH–] in water is always 10-14 at 25°C. Therefore, pH + pOH = -log[H+] + (-log[OH–]) = -log([H+][OH–]) = -log(10-14) = 14.

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