Brainlag PlusMoles in a solution, working out an unknown concentration from a titration, and the volume one mole of any gas takes up at room temperature and pressure.
Concentration in mol/dm³
Concentration can be given in moles of solute per dm³ of solution.
concentration (mol/dm³) = moles of solute ÷ volume (dm³)
moles = concentration × volume (dm³)
concentration (g/dm³) = concentration (mol/dm³) × Mr
All boards (Chemistry only, Higher): recall these.
- 0.050 mol of NaOH in 250 cm³ of solution
- 250 cm³ = 0.250 dm³
- concentration = 0.050 ÷ 0.250 = 0.20 mol/dm³
- in g/dm³: 0.20 × 40 = 8.0 g/dm³
The rest of this lesson and its 15 practice questions are in Plus.
Screen 1 of 4, free to read.
- 15 exam-style questions, marked as you go, each with a worked solution
- Anything you get wrong is saved to your flashcards