How do you calculate concentration from titration results?

Calculate moles of the known solution (n = C x V), apply the molar ratio from the balanced equation to find moles of the unknown, then divide by the unknown volume (C = n / V). Always convert cm3 to dm3 first by dividing by 1000.

How do you convert mol/dm3 to g/dm3?

Multiply the molar concentration (mol/dm3) by the molar mass (Mr) of the substance. For example, 0.1 mol/dm3 NaOH (Mr = 40) = 0.1 x 40 = 4.0 g/dm3.

What are concordant titres?

Concordant titres are titre values that are within 0.10 cm3 of each other. You average only the concordant values, ignoring the rough titre and any anomalous results.

Concentration & Titration Calculator (with Step-by-Step Working)

&9878; Reaction Ratio (from balanced equation)

Known (Titrant)

Unknown (Analyte)

💧 Known Solution (in Burette)

Concentration (mol/dm³)

Volume

Rough titre (cm³) Titre 1 (cm³) Titre 2 (cm³) Titre 3 (cm³)

⚗ Unknown Solution (in Flask)

Volume

Concentration (mol/dm³)

Optional: Mᵣ of unknown (for g/dm³ conversion)

Fill in the values above. Leave one field blank to solve for it.

Step-by-step Working

Tip: For C₁V₁ = C₂V₂, volumes do not need to be converted to dm³ as long as both sides use the exact same unit.

💧 Before Dilution

C₁ (mol/dm³)

V₁

⚗ After Dilution

C₂ (mol/dm³)

V₂

Fill in 3 of the 4 values. Leave one blank to solve.

Step-by-step Working

⚖ Impure Sample

Mass of impure sample (g)

Mᵣ of pure substance

💧 Excess Reactant Added

Concentration (mol/dm³)

Volume

⚗ Titrant (to neutralise leftover)

Concentration (mol/dm³)

Volume

Ratio (Excess : Titrant)

Ratio (Excess : Sample)

Fill in all values above, then press Calculate.

Step-by-step Working

Exam tip: Always show your working in exams. Write down the formula, substitute the values, and show clear unit conversions. This calculator follows the exact method examiners expect.

Need mole calculations? Try the Moles Calculator → Find empirical formulas with the Formula Calculator → Look up A_r values with the Periodic Table →