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sci.buffer-capacity-Henderson Calculator
Calculates buffer capacity β = dn/dpH from the Henderson-Hasselbalch equation: β = 2.303(K_w/[H⁺] + [H⁺] + c_a K_a[H⁺]/(K_a+[H⁺])²). Maximum buffer capacity occurs at pH = pKa — for a 0.1 M acetate buffer, β_max ≈ 0.058 mol/L/pH unit.
Inputs
Pka
Reference formula or conversion factor shown for context.
C Acid M
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Ratio
Reference formula or conversion factor shown for context.
Results
buffer pH
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
buffer capacity β (mol/L·pH)
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
pH range (±1 unit from pKa)
The difference between the maximum and minimum values.
Henderson-Hasselbalch: pH = pKa + log([A⁻]/[HA])
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
β is maximum at pH = pKa
The largest value in the dataset or feasible range.
classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.