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Study Plan for Practical Work
We pre-cut the sodium metal into appropriate sized pieces and provide a beaker of ethanol for disposal of any remaining sodium.
The oxidation reactions only need a few drops of the alcohol added to a dilute acidified solution of sodium dichromate(VI). It is worth stressing the quantities as students tend to use much more than is needed.
Materials:
| Methanol (10 cm3) | Ethanol (10 cm3) |
| Propan-1-ol (10 cm3) | Butan-1-ol (10 cm3) |
| Sodium metal fresh pre-cut pieces 2mm cube (4) | Phosphorus(V) chloride (1 g) |
| 1M sulfuric acid (20 cm3) | 0.1M sodium dichromate(VI) (1 cm3) |
| 8M ammonia solution (bottle) | |
| Combustion spoon | Evaporating basins (4) |
| Boiling tubes (4) | 100 cm3 beaker (4) |
| Bunsen burner | Heat-proof mat |
| Forceps | Dropping pipette |
| Filter paper |