Titration calculator: concentration from my burette readings
Titration
0.0967 mol dm⁻³
Questions people ask
What are concordant titres?
Titres within 0.10 cm³ of each other. AQA's practical handbook says to repeat until at least two are concordant and to average those, leaving out the rough titre.
How do I convert cm³ to dm³?
Divide by 1000. A titre of 24.15 cm³ is 0.02415 dm³.
What is the percentage uncertainty in a titre?
With two burette readings of ±0.05 cm³ each, the titre is ±0.10 cm³. For a 24.15 cm³ titre that is 0.10 ÷ 24.15 × 100 = 0.41%.
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How we work this out
What it does
Enter your burette readings, concentration, pipette volume and mole ratio: get the concordant titres, mean and concentration, step by step.
Acid-base and redox titration calculations at A level: an unknown concentration in the flask from a titrant of known concentration, for any whole-number mole ratio in the equation.
Method
- Each titre is final reading minus initial reading. A rough first run is left out.
- Concordant titres are the largest group within 0.10 cm³ of each other (AQA practical handbook). Their mean is the titre used.
- Moles of titrant = concentration × mean titre in dm³. Moles in the flask = moles of titrant × (flask coefficient ÷ titrant coefficient).
- Concentration in the flask = moles in the flask ÷ pipetted volume in dm³, given to 3 significant figures.
- Titre uncertainty: two burette readings of ±0.05 cm³ each give ±0.10 cm³; judging the end point to one drop adds ±0.05 cm³ (AQA practical handbook).