A chemist must add solute Q to a reaction. There are sufficient quantities of three stock solutions of Q. The records for the stock solutions use different units.
| Stock solution | Information recorded |
|---|---|
| J | 0.0180 mol of Q in 60.0 cm3 of solution |
| K | Concentration = 32.0 g/dm3 |
| L | Concentration = 0.350 mol/dm3 |
The relative formula mass, MrM_rMr, of Q is 80.0.
Calculate the concentration, in mol/dm3\text{mol}/\text{dm}^3mol/dm3, of stock solutions J and K.
The chemist needs 0.0500 mol of Q and wants to add the smallest possible volume of solution.
Identify which stock solution should be used. Give a reason for your answer.
Calculate the volume used in cm3\text{cm}^3cm3.
106 exam-style questions on AQA GCSE Chemistry 3.4 Using concentrations of solutions in mol/dm3, covering 3.4.1 Concentration in mol/dm3. Each one has a worked solution and a mark scheme showing where the marks go.