Before you can write down which solvent you used in each TLC, Professor Snape uses obliviate on you and now you no longer remember which solvent you used in each TLC. However, you have bottles of pure solutions of (1) diethyl ether, (2) dichloromethane, and (3) toluene on your bench. You discuss with Hermione which solvent you likely used in each TLC,
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Before you can write down which solvent you used in each TLC, Professor Snape uses obliviate on you...
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