5 calculators in this category
- pH & pOH CalculatorIUPAC pH definition, Kw = 1.0e-14 at 25 degCEnter any one of pH, pOH, [H + ], [OH − ], or the concentration of a strong acid or strong base, and this calculator…
- Weak Acid pH CalculatorKa equilibrium solved by exact charge balanceEnter the acid dissociation constant and the concentration you weighed out, and this calculator returns the pH, the equilibrium…
- Weak Base pH CalculatorKb equilibrium solved by exact charge balanceGive this calculator the base ionisation constant — as K b , p K b , or the K a of the conjugate acid — together…
- Henderson-Hasselbalch Buffer CalculatorHenderson-Hasselbalch equation (25 °C thermodynamic pKa)The Henderson-Hasselbalch equation says a buffer's pH depends on only two things: the pKa of the weak acid and the ratio of…
- Acid-Base Titration CalculatorStoichiometric equivalence, MₐVₐnₐ = M_bV_bn_bA titration converts a burette reading into a concentration. At the equivalence point the moles of titratable protons supplied…
Which one do you need?
- pH & pOH Calculator
- Convert between pH, pOH, hydrogen ion and hydroxide concentration, or get the pH of any strong acid or base. Includes the exact very-dilute case and temperature.
- Weak Acid pH Calculator
- Find the pH, hydrogen ion concentration and percent ionization of a weak acid from its Ka or pKa and molarity. Solved exactly, including the water term.
- Weak Base pH Calculator
- Calculate pOH, pH, hydroxide concentration and percent ionization of a weak base from Kb, pKb or the conjugate acid Ka. Exact solution, no 5 percent guesswork.
- Henderson-Hasselbalch Buffer Calculator
- Compute buffer pH from the base-to-acid ratio, or get the grams of acid and conjugate base to weigh for a target pH. Includes buffer capacity and range.
- Acid-Base Titration Calculator
- Find an unknown molarity or the equivalence-point volume from titration data. Handles polyprotic acids and bases, moles titrated, normality and mass.