Microscale Hoffman voltameter – Using a microscale Hoffman voltameter, made using syringes, to electrolyse water and then ignite bubbles of mixtures of hydrogen and oxygen. atomic structure and bonding related to properties of materials Use of small scale and a neutralising bath reduces the production of toxic SO2Īn autocatalytic reaction – A few drops of acid initiate a reaction which proceeds down a measuring cylinder changing colour as it goes – catalysed by its own products.Ĭatalyst at Work – A demonstration of a temporary activated complex of cobalt as it acts as a catalyst.ī. Thiosulphate acid reaction – microscale – A small scale version of the classic investigation into rates of reaction. (Workshop is aimed at Advance Higher but without the mathematics it can easily be adapted to this level). Rhubarb, Rhubarb – Using rhubarb to decolourise permanganate in order to follow the rate of reaction, looking at concentration and surface area (and possibly temperature)Īntioxidants – This is a range of investigations based around the Briggs-Rauscher oscillating reaction to look at antioxidant levels in fruits and teas (though the method can be adapted for any source of antioxidants).īleaching Blue Food Dye – Reaction to determine rate constant and order of reaction from the bleaching of blue food colouring by domestic bleach. Pyrophoric Iron – nanoparticles of iron are generated and when poured from a height they spontaneously catch fire in the air leading to a shower of tiny sparks. Light sticks (Demo) – Effect of temperature on luminosity of glow-sticks (this can also be done as a class experiment) The key areas covered in this section are:Ĭolourless orange or blue (Demo) – a demo version of the Briggs-rauscher reaction as used in the antioxidants workshop.Ĭool experiment (Demo) – endothermic reaction between barium hydroxide and ammonium thiocyanate.
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