molecalculator

Section 06

Acid, base and buffer calculators

pH from a hydrogen-ion concentration, buffer pH from the Henderson–Hasselbalch equation and the acid and base amounts for a buffer at a target pH.

Calculators in this section
19
Typical formula
pH = pKa + log([A⁻] ÷ [HA])
Photo collage: a row of small beakers with solutions in a rainbow of indicator colours from red to purple, and a close-up of a pH electrode in a beaker of clear liquid.

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No. 06-0030pH Calculator From Concentration: pH = −log[H+]pH2.60pH, pOH and hydroxide concentration from the molar concentration of hydrogen ions of a strong acid at 25 °C, w… No. 06-0291Vinegar pH Titration Calculator and MethodAcetic acid concentration0.084 mol/LA vinegar pH titration calculator estimates the acetic acid concentration from the amount of base used to reac… No. 06-0254pKa Calculator From Kb: Convert Base StrengthA pKa-from-Kb calculator converts a base dissociation constant, Kb, into the pKa of its conjugate acid. Enter…

Everything in Acids, Bases & Buffers

PageWorks outExample result
Acid Titration Calculator: Find Unknown ConcentrationUnknown acid concentration0.0800 mol/L
Ka from Molarity: Calculate Acid DissociationKa1.845 × 10−5 mol/L
Lowest pKa Calculator: Compare Acid StrengthLowest pKa-10.000 pKa
Monosodium Phosphate Buffer Calculator: NaH2PO4 and Na2HPO4 for a Target pHMonosodium phosphate NaH2PO42.321 g
Online pKa Calculator From Structure: What It Can Predict
pH Calculator for Lemon Juice TitrationEstimated pH2.400
pH Calculator From Concentration: pH = −log[H+]pH2.60
pKa Calculation Examples: Formulas and Worked AnswerspKa5.000
pKa Calculation Formula: Henderson–Hasselbalch ExplainedEstimated pH4.7600
pKa Calculation From pH: Formula and ExamplesCalculated pKa4.76
pKa Calculation Practice Problems With Worked AnswerspH4.76
pKa Calculation Steps: Formula and Worked Example
pKa Calculation: Formula, Examples, and LimitspKa5.0000
pKa Calculator for Bases: Find the pKa of a Conjugate AcidConjugate-acid pKa9.25
pKa Calculator From Kb: Convert Base Strength
pOH Calculator From pH: Convert Acidity to Basicity
Sodium Hydroxide Solution Calculator and GuideNaOH mass0.9999 g
Tris Buffer pH Calculation: Henderson–Hasselbalch for Tris and Tris-HClBuffer pH7.70
Vinegar pH Titration Calculator and MethodAcetic acid concentration0.084 mol/L

Every calculator uses a standard formula and shows it, with the constants and unit factors it needs. Method and constants.