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Describe how you could obtain a pure sample of solid fullerene from soot. You should explain what happens during each stage of the process. All common laboratory apparatus are available to you.
Chemistry 5070 · O Level · Separation and purification
Separation and purification — practice question
Fullerenes are solid carbon allotropes. They are present in soot, which also contains other carbon allotropes. Fullerenes dissolve in liquid hydrocarbons such as heptane, whereas the other carbon forms in soot do not dissolve in heptane.
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This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Add heptane / a liquid hydrocarbon, then stir, shake, heat or mix it.” …
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