Required practical 1: make up a volumetric solution and carry out a simple acid-base titration.

In the subtopic A-level required practical activities, this AQA A-Level Chemistry 7405 learning objective focuses on required practical 1: make up a volumetric solution and carry out a simple acid-base titration. It belongs to A-level practical endorsement and required practical activities, so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include titration, required practical. Volumetric solution. means a solution of known concentration used in titrations to determine the concentration of an unknown solution Avoid the mistake of students often forget to convert the volume of the solution from cm³ to dm³ when calculating concentration; instead, to fix this, remember that 1 dm³ = 1000 cm³. Use the formula for concentration: concentration (mol/dm³) = moles / volume (dm³). Convert the volume by dividing the cm³ value by 1000 before substituting into the formula. For example, if you have 25 cm³ of solution, convert it to dm³: 25 cm³ ÷ 1000 = 0.025 dm³. Then, if you have 0.1 moles of solute, the concentration would be: concentration = 0.1 moles / 0.025 dm³ = 4 mol/dm³ For exam answers, always prepare your volumetric solution accurately before starting the titration. Use a pipette to measure the acid or base and ensure the burette is filled correctly