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sci.acid-base-Henderson-Hasselbalch Calculator
Calculates buffer pH using the Henderson-Hasselbalch equation for weak acid-conjugate base systems. Acetate buffer (pKa = 4.76): equal molar concentrations give pH = 4.76; 10:1 ratio of acetate to acetic acid gives pH = 5.76.
Inputs
Pka
Reference formula or conversion factor shown for context.
Conc Acid M
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Conc Base M
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Results
pH
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
buffer capacity β (mol/L per pH unit)
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
ratio [A⁻]/[HA]
The proportional relationship between two quantities.
pH = pKa + log([A⁻]/[HA])
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
most effective buffer range
The difference between the maximum and minimum values.