A drinks manufacturer has two glucose solutions: solution A has a concentration of 18.0 g/dm3\mathrm{g/dm^{3}}g/dm3 and solution B has a concentration of 6.0 g/dm3\mathrm{g/dm^{3}}g/dm3. The manufacturer will mix a total volume of 100.0 cm3\mathrm{cm^{3}}cm3, using measured volumes selected from 20.0, 30.0, 40.0, 60.0, 70.0 and 80.0 cm3\mathrm{cm^{3}}cm3.
Which volumes of solutions A and B will give a mixture with a concentration of 9.6 g/dm3\mathrm{g/dm^{3}}g/dm3?
70.0 cm3\mathrm{cm^{3}}cm3 of solution A and 30.0 cm3\mathrm{cm^{3}}cm3 of solution B
20.0 cm3\mathrm{cm^{3}}cm3 of solution A and 80.0 cm3\mathrm{cm^{3}}cm3 of solution B
30.0 cm3\mathrm{cm^{3}}cm3 of solution A and 70.0 cm3\mathrm{cm^{3}}cm3 of solution B
40.0 cm3\mathrm{cm^{3}}cm3 of solution A and 60.0 cm3\mathrm{cm^{3}}cm3 of solution B
152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.