![]() ![]() The demonstrator should wear a laboratory coat (the experiment can become messy at the end).In addition to wearing eye protection, students should stand further than 4 m from the reaction. Safety screens must be used to surround the apparatus.For the demonstrator this must be goggles or a face shield. Both the demonstrator and all observers must wear eye protection.Read our standard health and safety guidance.Domestic sparkler, 16 cm long (sold for indoor use).Aluminium powder (medium grade) (HIGHLY FLAMMABLE), 3 g.Plastic magnetic retriever or small bar magnetĬhemicals For the thermite mixture (note 6):.Plastic beaker or thick-walled glass beaker, 1 dm 3 (must fit between tripod legs).The demonstration takes about 10 minutes to carry out if the apparatus is set up and the solid reagents are weighed in advance. The demonstrator must have room to move quickly away to a safe distance. The bench should be clear of combustible materials and protected with a sheet of hardboard or heat-resistant mats. It is essential not to exceed the stated quantities and that the demonstrator and students are protected by safety screens. There have been occasional reported explosions when using methods similar to this. ![]() A rehearsal is essential if this experiment has not been done before. It produces a result within seconds of setting it off because the water cools the iron down very quickly. Do NOT do this demonstration in a fume cupboard or outdoors. The method described here is performed on a laboratory bench and produces limited fumes. Siting the demonstration in a fume cupboard has caused damage to the cupboard. Some teachers have had accidents when performing the procedure outside in a strong breeze the powders blew into the flame, caught fire and caused burns to the hand and/or face. The reaction is violent but safe provided the procedures are followed exactly. RSC Yusuf Hamied Inspirational Science Programme.Introductory maths for higher education.The physics of restoration and conservation.AlN, GaN, and InN have wurtzite structures analogous to cubic BN, but show no analogue of the graphite-type structure of BN. ![]() Gallium, indium, and thallium dissolve readily in acids, but thallium dissolves slowly in H 2SO 4 and HCl.
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