ISSR CLASSES
Checkpoint Science
iGCSE Chemistry
iGCSE Physics
iGCSE Coordinated Science
A-Level Chemistry
PRACTICALS
Practicals Home
Practicals A-Z
Study Plan for Practical Work
If you don't have good fume cupboard access these reactions can be done as a demonstration. With reasonable access to fume cupboards the group can always be split in two and the practical carried out over two classes with some theory work for half the class.
Materials:
| Potassium chloride (1 g) | Potassium bromide (1 g) |
| Potassium iodide (1 g) | Concentrated sulfuric acid (1 cm3) |
| 8M ammonia solution (bottle) | Potassium dichromate paper* (3 strips) |
| Full range indicator paper (3 strips) | Lead ethanoate paper (3 strips) |
| Test tubes (3) | Dropping pipette |
| Forceps |
*made by soaking strips in a mixture of equal volumes of 0.1M potassium dichromate solution and 1M sulfuric acid