Chemistry
Titration Concentration Calculator
Correct an endpoint for blank, calculate analyte molarity in the titrated aliquot, and recover original-sample molar and mass concentration.
Blank-corrected titrant volume (mL)-
Moles of titrant delivered-
Moles of analyte in aliquot-
Analyte concentration in titrated aliquot (mol/L)-
Original sample concentration (mol/L)-
Original sample mass concentration (g/L)-
Decision view
Burette endpoint, stoichiometric equivalence, and dilution back-calculation
Burette endpoint, stoichiometric equivalence, and dilution back-calculationThe live burette drains to the corrected endpoint before the mole ratio maps the aliquot result back to the original sample.
Exact scenario comparisonTitrant volume at endpoint (mL) changes while all other entered assumptions remain constant.
| Titrant volume at endpoint (mL) | Blank-corrected titrant volume (mL) | Moles of titrant delivered | Moles of analyte in aliquot | Analyte concentration in titrated aliquot (mol/L) | Original sample concentration (mol/L) | Original sample mass concentration (g/L) |
|---|
How to use Titration Concentration Calculator
- Enter standardized titrant concentration.
- Use the endpoint volume and blank from the same method.
- Record aliquot volume, dilution factor, and equation coefficients.
Calculator guide
Understanding Titration Concentration Calculator
A titration endpoint measures delivered titrant moles. The balanced mole ratio converts those moles to analyte amount before aliquot volume and sample dilution are applied.
Detailed calculation process
Detailed titration back-calculation
The default uses 0.1 M titrant, a 24.6 mL endpoint, 0.2 mL blank, 20 mL aliquot, and fivefold prior dilution.
General formula: V_T,corr=V_end-V_blankn_T=C_T V_T,corr/1000n_A=n_T(ν_A/ν_T)C_aliquot=n_A/(V_A/1000)C_original=C_aliquot Dρ_A=C_original M_A Each stage has its own volume basis: corrected burette volume, aliquot volume, then original-sample dilution.
What each symbol means
Worked substitution with the default inputs
The default original sample is estimated at 0.610 M or about 36.63 g/L.
Worked situations
Practical examples
- The default corrected endpoint is 24.4 mL.
- At 0.1 M and 1:1 stoichiometry, the aliquot is 0.122 M and the original fivefold-diluted sample is 0.61 M.
Better inputs
Useful tips
- Standardize titrant near the analysis date.
- Use replicate endpoints and report their spread.
- Match the blank matrix and indicator method.
Before relying on the result
Limitations and common mistakes
- The endpoint is assumed equivalent to the stoichiometric point.
- No uncertainty, activity, side reaction, indicator bias, or electrode calibration is modeled.
- The dilution factor is user supplied.
Reference
Key terms
- Endpoint
- Observed signal used to stop titrant delivery.
- Blank correction
- Titrant volume consumed without analyte.
- Aliquot
- Measured subsample subjected to titration.
Important note
Use validated titrant standardization, calibrated volumetric equipment, method-specific blanks, replicate endpoints, and the correct balanced reaction.
Frequently asked questions
Why subtract the blank?
It removes titrant consumed by the method or matrix rather than analyte.
Which way does the coefficient ratio go?
Analyte moles equal titrant moles times νanalyte/νtitrant.
Does dilution change analyte moles in the aliquot?
It changes concentration and selected amount, so the entered dilution factor restores the original concentration.