Paper 6 opens with a question on apparatus and methods and ends with a plan you write yourself. Work through eight sets: name the apparatus from drawings, choose the right method to separate or purify, read a chromatogram and work out Rf values, prepare a salt, collect and test a gas, spot the mistake in a set-up, and put together plans that compare substances or measure a quantity. Every question is new each time, marked as you go and has a worked solution. Exam mode mixes the sets with no feedback until the end. Allow 5 to 10 minutes per set.
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The exact name: (conical) flask, volumetric pipette, burette, measuring cylinder, gas syringe, condenser, crucible, evaporating basin. “Flask” or “tube” on its own is often not enough.
The right separation method for the mixture, key words such as residue and filtrate, and the reason behind each detail: pencil baseline, solvent below the baseline, thermometer bulb level with the side arm, water into the bottom of the condenser.
Spot a sealed apparatus that is heated or makes a gas, say what would happen, and give a precaution that matches the hazard, such as a fume cupboard for a toxic gas.
A workable order, named apparatus with sensible quantities, what is kept the same, what is measured, and how the results answer the question (for example, the sample that needs more alkali is more concentrated).
The marking follows the conventions in published Cambridge mark schemes. The experiments, readings and wording on this page are our own.