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PRACTICALS
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Study Plan for Practical Work
It is always worth checking the ammonia solution immediately before the practical to see that it does take about 50 cm3 to neutralize 25 cm3 of the sulfuric acid.
Impurities in the iron produce a fairly unpleasant smell on reaction with the sulfuric acid. This is best done in the fume cupboard. Failing this, some good ventilation will make things more breathable.
Materials:
| 2M sulfuric acid (55 cm3) | 2 M ammonia solution (75 cm3) |
| Iron filings (0.6 g) | |
| 250 cm3 conical flask | Tripod and gauze |
| Bunsen burner | Heat proof mat |
| Cotton wool | 100 cm3 beaker |
| Glass rod | Red litmus paper |
| 400 cm3 beaker | Filter funnel and paper |
| 100 cm3 conical flask | Petri dish |
| Spatula | 25 cm3/50 cm3 measuring cylinders |
| Balance with accuracy of at least ± 0.01 g |