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Acid–Base Titration Calculator
pH at any point of a titration — equivalence volume plus before/equivalence/after logic for strong–strong and weak acid–strong base systems.
Calculator
Results update as you type. Every step of the working is shown below.
Examples:
Result
Enter values above — the answer appears here instantly, with full working.
Formula used
equivalence: n_acid = n_base; regions: excess strong reagent, HH buffer, hydrolysis
Every result substitutes your values into this relation step by step above.
Assumptions
- Titrant is a strong base (NaOH) — the standard school setup.
- Weak-acid case uses Henderson–Hasselbalch before equivalence and hydrolysis at equivalence (both labeled approximations).
- Activity effects ignored; 25 °C.