Neutralization Calculator

Your details

Select the unknown quantity you want to find.
Molar concentration of the acid solution.
mol/L
Volume of the acid solution.
Number of ionisable protons the acid donates (valence factor).
Molar concentration of the base solution.
mol/L
Volume of the base solution.
Number of hydroxide ions the base can donate (valence factor).
ResultExact equivalence
12.5

Solved quantity at the equivalence point

UnitmL
Acid equivalents (n x mol)0.0025eq
Base equivalents (n x mol)0.0025eq
Excess equivalents0eq
Acid normality0.1N
Base normality0.2N
Acid equivalents (eq)0.0025
Base equivalents (eq)0.0025

To neutralize this acid-base pair you need 12.5000 mL (volume of base needed).

  • At the equivalence point both sides deliver 0.002500 equivalents, meaning all H+ ions are matched by OH- ions.
  • Acid normality is 0.1000 N (molarity x na=1); base normality is 0.2000 N (molarity x nb=1).
  • The mixture is at exact equivalence: a neutral salt and water are the only products.

Next stepFor weak acid or weak base pairs, the equivalence-point pH shifts away from 7.0; use a buffer or Ka/Kb calculator to find the exact pH after neutralization.

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