Henderson-HasselbalchChemistry
Henderson-Hasselbalch Buffer pH & Capacity Calculator
Calculate buffer solution pH, conjugate base-to-acid ratio, and Van Slyke buffer capacity (β) from weak acid pKa and component molar concentrations.
Calculated Result
Buffer Solution pH
5.76pH
Calculator Inputs
-
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M
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M
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Buffer Solution pH
5.76pH
Conjugate Base to Acid Ratio
1.5 -
Buffer Capacity (β)
0.14 M/pH unit
Buffer System Indicators
pKa Value
4.76 -(45%)
Buffer pH
5.76 pH(55%)
Standard biochemistry and analytical chemistry tool for buffer preparation and physiological equilibrium.
Calculation Methodology
Henderson-Hasselbalch Equation: pH = pKa + log10( [Conjugate Base A-] / [Weak Acid HA] ). Optimal buffering occurs when [A-] = [HA], where pH = pKa.
Frequently Asked Questions
The accepted buffering range is typically pH = pKa ± 1. Outside this interval, one component is depleted, causing resistance to pH changes to drop dramatically.
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