Science · Grades 10–12
Concentration and dilution: avoid common errors · revision card
Molar concentration uses the total final solution volume in litres.
Keep these ideas clear
Use solution volume
Molar concentration uses the total final solution volume in litres.
Track solute amount
Dilution with solvent conserves the solute amount when there is no reaction or loss.
Two useful examples
For c = n/V in mol/L, which V is required?
final solution volume in litres
final solution volume in litres
Convert 250 mL to litres.
250 ÷ 1000 = 0.25
0.25
Explain it without looking
- A student divides moles by 250 for a 250 mL solution and reports mol/L. Explain the error.
Further reading and review references
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.