Negative log of mular concentration of H+ ions is called___________________?
Correct answer: A. pH
- A. pH
- B. pOH
- C. pKa
- D. pKw
Explanation
pH is defined as the negative logarithm of the hydrogen-ion concentration: pH = -log[H+]. pOH uses hydroxide concentration, pKa uses the acid dissociation constant, and pKw uses the ionic product of water. The likely trap is pOH, because both pH and pOH are negative logarithmic quantities, but pOH applies to OH- rather than H+.
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About Buffer Solutions
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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