Enter titration details
Choose a mode first. Use known titrant concentration to solve unknown analyte concentration, known analyte concentration to solve titrant concentration, or predict the required titrant volume.
Core relationships
General stoichiometric balance:
(CT,eff × VT,corr) / a = (CA,aliquot × VA) / b
Corrected titration volume:
VT,corr = average trial volume − blank volume
Effective titrant concentration:
CT,eff = CT × (purity / 100)
Original analyte concentration after dilution:
CA,original = CA,aliquot × dilution factor
Required titrant volume:
VT,required = [(CA,aliquot × VA × a) / (CT,eff × b)] + blank
Here, a is the titrant coefficient and b is the analyte coefficient from the balanced equation. Volumes are converted internally from milliliters to liters during molar calculations.
Simple workflow
- Select the calculation mode that matches your lab objective.
- Enter the balanced reaction coefficients for titrant and analyte.
- Provide concentrations, aliquot volume, blank correction, dilution factor, and purity.
- Enter one to three trial volumes from the burette.
- Press Submit to display the result above the form, review the table, inspect the graph, and export CSV or PDF.
Sample chemistry cases
| Case | Mode | Titrant | Analyte | Aliquot | Trial volumes | Blank | Stoichiometry | Result |
|---|---|---|---|---|---|---|---|---|
| Example 1 | Unknown analyte concentration | 0.1000 mol/L NaOH | HCl | 25.00 mL | 24.80, 24.75, 24.82 mL | 0.05 mL | 1:1 | 0.098960 mol/L HCl |
| Example 2 | Required titrant volume | 0.0200 mol/L EDTA | 0.0100 mol/L Ca2+ | 25.00 mL | Optional | 0.02 mL | 1:1 | 12.5200 mL EDTA |
Common questions
1. What does corrected titration volume mean?
It is the average measured titre after subtracting the blank. This removes background reagent consumption and improves the chemical relevance of the delivered volume.
2. Why are stoichiometric coefficients required?
The balanced reaction controls the mole ratio between titrant and analyte. Without correct coefficients, the concentration or required volume can be systematically wrong.
3. When should I use a dilution factor?
Use it when the titrated aliquot came from a diluted stock solution. The calculator converts the aliquot result back to the original sample concentration.
4. Why does the calculator include titrant purity?
Purity changes the effective concentration of the active reagent. Lower purity means less active titrant per liter, which changes the calculated moles and delivered volume.
5. Can this work for redox and complexometric titrations?
Yes. The same mole-balance structure applies as long as you enter the correct balanced coefficients, concentration data, and the proper observed titres.
6. What if my trial volumes vary too much?
Check the standard deviation and relative standard deviation. Large spread suggests endpoint inconsistency, burette reading error, poor mixing, or a reaction problem.
7. Does blank correction always reduce the final titre?
For measured trials, yes, the blank is subtracted. For predicted required volume, the blank is added back so the practical burette target remains realistic.
8. What units are reported?
Volumes are shown in milliliters. Concentrations are shown in mol/L, and mass concentration appears in g/L when a molar mass is supplied.