Titration Calculator

How to use this calculator

Enter the titrant concentration and volume used, the mole ratio from the balanced equation and the analyte volume. The analyte’s concentration is calculated.

Formula

C_a V_a = r × C_t V_t

Worked example

23.4 mL of 0.1 M NaOH neutralises 25.0 mL of HCl (ratio 1):

C_HCl = 0.1 × 23.4 ÷ 25.0 = 0.0936 mol/L

For 25.0 mL of H₂SO₄ instead (ratio 0.5): 0.0468 mol/L.

Choosing an indicator

Titration	Indicator
Strong acid – strong base	Phenolphthalein or methyl orange
Weak acid – strong base	Phenolphthalein
Strong acid – weak base	Methyl orange

Frequently asked questions

How do I calculate concentration from a titration?

Moles of titrant = concentration × volume. Use the mole ratio from the balanced equation to get moles of analyte, then divide by the analyte volume.

What is the mole ratio for sulfuric acid with NaOH?

H₂SO₄ + 2NaOH → products, so 1 mol acid reacts with 2 mol NaOH. The ratio of analyte (acid) per titrant (NaOH) is 0.5.

How many titrations should I do?

Repeat until you get at least two concordant results (within about 0.1 mL) and average them.

Embed this calculator