A technician has 375 cm3375\ \mathrm{cm^{3}}375 cm3 of potassium nitrate solution with a concentration of 32.0 g dm−332.0\ \mathrm{g\,dm^{-3}}32.0 gdm−3.
The technician adds water until the total volume of the solution is 600 cm3600\ \mathrm{cm^{3}}600 cm3. No potassium nitrate is lost.
Calculate the concentration of potassium nitrate in the diluted solution in g dm−3\mathrm{g\,dm^{-3}}gdm−3.
142 exam-style questions on Edexcel GCSE Chemistry 2.6 Calculations involving masses, covering 2.6.1 Relative formula mass and percentage composition, 2.6.2 Empirical and molecular formulae, 2.6.3 Conservation of mass, 2.6.4 Reacting masses and concentration in g dm⁻³, 2.6.5 The mole and the Avogadro constant, and 2.6.6 Limiting reactants and stoichiometry. Each one has a worked solution and a mark scheme showing where the marks go.