Titration Calculator
⚗ Moles & Stoichiometry. Use the Titration (finding a concentration) formula to find unknown concentration, its volume, known concentration, titre (volume added), ratio: known (a), ratio: unknown (b): pick the value you want, type the others, and the answer updates as you go.
a and b are the numbers in front of the two chemicals in the balanced equation (1 and 1 for HCl + NaOH).
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Unknown concentration | mol/dm³ |
| Its volume | cm³ |
| Known concentration | mol/dm³ |
| Titre (volume added) | cm³ |
| Ratio: known (a) | no unit |
| Ratio: unknown (b) | no unit |
Worked example
Find the unknown concentration when Its volume = 25 cm³, Known concentration = 0.1 mol/dm³, Titre (volume added) = 20 cm³, Ratio: known (a) = 1, Ratio: unknown (b) = 1.
Using c1 V1 × b/a = c2 V2: Unknown concentration = 0.08 mol/dm³.
Frequently asked questions
What is the formula for Titration (finding a concentration)?
c1 V1 × b/a = c2 V2. a and b are the numbers in front of the two chemicals in the balanced equation (1 and 1 for HCl + NaOH).
What do the letters stand for, and what units are used?
Unknown concentration in mol/dm³, Its volume in cm³, Known concentration in mol/dm³, Titre (volume added) in cm³, Ratio: known (a), Ratio: unknown (b).
How do you calculate unknown concentration?
Put the values into c1 V1 × b/a = c2 V2. For example, with Its volume = 25 cm³, Known concentration = 0.1 mol/dm³, Titre (volume added) = 20 cm³, Ratio: known (a) = 1, Ratio: unknown (b) = 1, unknown concentration = 0.08 mol/dm³.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (unknown concentration, its volume, known concentration, titre (volume added), ratio: known (a), ratio: unknown (b)) and fill in the others: it rearranges the formula for you.
