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It might be worth revising the reaction between potassium bromide and concentrated sulfuric acid which can be found here. The students are usually happy to have produced a clearly new product. I don't try to purify the product (we shall be doing this in the next experiment), but it is worth asking students how they would go about this process.
Materials:
| Ethanol [IDA] (5 cm3) | Concentrated sulfuric acid (5 cm3) |
| Potassium bromide (6 g) | |
| 10 cm3 measuring cylinder | 50 cm3 round-bottomed flask |
| Funnel | Tripod and gauze |
| Bunsen burner | Mortar and pestle |
| Expansion adapter | Powder funnel |
| Spatula | Glass bend |
| Still head | Stopper |
| Joint clip | 100 cm3 conical flask |
| Laboratory jack or alternative |