Idea of pH and pOH was put forward by________________?
Correct answer: C. Sorenson
- A. Gibbs
- B. Einstein
- C. Sorenson
- D. Chadwick
Explanation
Sørensen introduced the pH scale in 1909 and the related pOH concept is treated with it in acid-base chemistry. The scale expresses acidity as pH = -log[H+], while pOH expresses hydroxide concentration similarly. The likely mistake is choosing Gibbs because he made major contributions to thermodynamics and chemical equilibrium, not to the pH scale.
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Buffer solutions resist changes in pH when small amounts of acid or base are added, using a weak acid and its conjugate base or a weak base and its conjugate acid. Work includes buffer action, the common-ion effect, Henderson-Hasselbalch calculations, buffer capacity, and the difference between acidic and basic buffers.
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