Henderson Hasselbalch Equation Definition

What Is the Henderson Hasselbalch Equation in Chemistry?

Henderson Hasselbalch Equation Definition: an approximate equation that shows the relationship between the pH or pOH of a solution and the pKa or pKb and the ratio of the concentrations of the dissociated chemical species.

Examples: pH = pKa + log ([conjugate base]/[weak acid]) or pOH = pKa + log ([conjugate acid]/[weak base])

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Helmenstine, Anne Marie, Ph.D. "Henderson Hasselbalch Equation Definition." ThoughtCo, Feb. 16, 2016, thoughtco.com/henderson-hasselbalch-equation-definition-606358. Helmenstine, Anne Marie, Ph.D. (2016, February 16). Henderson Hasselbalch Equation Definition. Retrieved from https://www.thoughtco.com/henderson-hasselbalch-equation-definition-606358 Helmenstine, Anne Marie, Ph.D. "Henderson Hasselbalch Equation Definition." ThoughtCo. https://www.thoughtco.com/henderson-hasselbalch-equation-definition-606358 (accessed January 20, 2018).