![]() Using the tweezers, remove a large piece of the alkali metal from the oil. A technician should prepare the pieces of metal and store them under oil.Universal indicator solution (HIGHLY FLAMMABLE).2-methylpropan-2-ol (HIGHLY FLAMMABLE, HARMFUL), 150 cm 3 (Note 2).Ethanol (HIGHLY FLAMMABLE) or Industrial denatured alcohol (IDA) (HIGHLY FLAMMABLE, HARMFUL), 150 cm 3 (Note 2).Potassium (HIGHLY FLAMMABLE, CORROSIVE), 3 mm cubes.Sodium (HIGHLY FLAMMABLE, CORROSIVE), 4 mm cubes.Lithium (HIGHLY FLAMMABLE, CORROSIVE), 5 mm cubes.Small bottles of oil containing small pieces of the following metal (Note 1): Glass or Perspex sheets to cover troughs (optional).One or more large glass troughs, 5 dm 3 capacity.Light bulb in holder (for testing conductivity).Scalpel or sharp knife to cut the metals.Goggles or a face shield for the demonstrator, eye protection for the audience. ![]() The experiments take about 10–20 minutes if everything is prepared in advance. Advance preparation includes cutting pieces of alkali metals to the recommended size, filling water troughs and setting up safety screens. You should try the experiments in advance if you have not done them before. These demonstrations show the similarity of the physical and chemical properties of the alkali metals and the trend in reactivity down group 1 of the Periodic Table. RSC Yusuf Hamied Inspirational Science Programme. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |