Chemical demonstration The serpent |
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A great demonstration of the action of an inorganic catalyst on the rate of a chemical reaction is the "Serpent". |
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To conduct this activity you will need a: - pneumatic trough - Potassium iodide crystals - 33% hydrogen peroxide - Dishwashing liquid - Green food dye. - 100ml measuring cylinder Place 20ml of hydrogen peroxide solution in the measuring cylinder. Add detergent (about 6 ml) and a few drops of green food dye. Place the mesuring cylinder in the trough and add a small spatula full of KI crystals. |
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The demonstration shows vividly
the increase in the rate of the reaction represented by the equation
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Look at the chemical reaction. Is this reaction exothermic or endothermic? |