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Instructions for making concrete bars of varying compositions, which can be subsequently tested for strength.
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Disposal of waste sealed sources by the grout/dustbin route.
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Using calcium hydroxide and oxide safely in practical work. Includes quick lime, slaked lime and limewater.
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Oscillating reactions provide a fascinating insight into reaction kinetics. They provide unusual observations and a visual hook for discussing rates of reaction and auto-catalysis.
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When the iron/sulfur mixture is heated, the sulfur melts and reacts with the iron exothermically to form iron(II) sulfide. This is an important demonstration that shows that the properties of a compou..
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Make-it guide: standard test source for checking a GM counting system
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Health and safety advice on using sulfur and phosphorus in science practical activities. Includes white sulfur which is no longer readily available in the UK.
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The reaction between iron and sulfur, to produce iron sulfide, is cited in many textbooks and other resources as a good demonstration of the difference between mixtures and compounds. A key distinguis..
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This edition includes notes on an airgun incident in a school, examining autoclaves and pressure cookers, declining supplies of potassium and phosphorus, a theft of pestles from labs, and tips on cons..
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Advice for teachers of the new Science A level courses, plants for photosynthesis practicals, latest updates to the faulty Bunsen burners story, how to safely view the transit of Mercury, disposal of ..
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