Solutions & titration · SL/HL
Molar concentration
Relate concentration, amount and solution volume.
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Number formats & units
Use decimal dots in datasets. Single values also accept decimal commas and scientific notation such as 1.2e-3 or 1.2 × 10⁻³.
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Result & working
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Interpretation & assumptions
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Formula & example
The relationship
What the variables mean
| Symbol | Meaning |
|---|---|
| Molar concentration in mol dm⁻³. | |
| Solution volume in dm³ in the equation. |
Worked example
- Solve for
- Concentration C
- Amount n / mol
- 0.00250
- Volume
- 25.0
- Volume unit
- cm³
0.1 mol dm⁻³
Follow the example steps
- V = 25 cm³ = 0.025 dm³
- C = n/V = 0.0025 / 0.025 = 0.1 mol dm⁻³
Common mistakes
Convert cubic centimetres to cubic decimetres.
Incorrect approach
n = 0.01 mol, V = 25 cm³: C = 0.01/25
Correct approach
V = 0.025 dm³: C = 0.01/0.025 = 0.4 mol dm⁻³
More checks before you submit
- 25 cm³ = 0.025 dm³, not 25 dm³.
Method notes
This relation counts amount of solute per final solution volume, not solvent volume added.