IN SEARCH OF MORE SOLUTIONS 2000

    J Taylor The Royal Society of Chemistry The following three problems have been reproduced (with permission from The Royal Society of Chemistry) from 'In Search of More Solutions, More Ideas from Problem Solving Activities' published and distributed by the Royal Society of Chemistry. ANY GLUCOSE? Design a biosensor to detect glucose. Glucose can be ...
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    IN SEARCH OF MORE SOLUTIONS 99

    J Taylor The Royal Society of Chemistry The following three problems have been reproduced (with permission from The Royal Society of Chemistry) from 'In Search of More Solutions, More Ideas from Problem Solving Activities' published and distributed by the Royal Society of Chemistry. 6. FROM MILK TO CURDS AND WHEY. WHICH ENZYME? Find out which of th...
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    MICROSCALE CHEMISTRY 2000

    J Skinner The Royal Society of Chemistry The following four experiments have been reproduced (with permission from The Royal Society of Chemistry) from "Microscale Chemistry" published and distributed by the Royal Society of Chemistry. 4. THE REACTION OF METALS WITH ACIDS In this experiment you will be looking at the reactions between various metal...
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    MICROSCALE CHEMISTRY

    J Skinner The Royal Society of Chemistry The following four experiments have been reproduced (with permission from The Royal Society of Chemistry) from "Microscale Chemistry" published and distributed by the Royal Society of Chemistry. 3. OBSERVING CHEMTCAL CHANGES In this experiment you will be observing the changes that occur when you mix solutio...
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    Light Scattering by a Colloid (The Tyndall Effect) - "The Thiosulfate Sunset"

    Description A beam of white light is shone through a solution of sodium thiosulfate and onto a screen. Dilute hydrochloric acid is added to the thiosulfate and colloidal sulfur is formed. The light beam becomes visible in the solution as a bluish 'Tyndall cone' due to light scattered from the colloidal particles. Blue light is scattered more effect...
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    The Thermal Decomposition of Nitrates - "Magic Writing"

    Description A message is written on filter paper with a solution of sodium nitrate and is then dried. Applying a glowing taper to the start of the message makes the treated paper smoulder and the message is revealed as the glow spreads its way through the treated paper only. Apparatus ​ Filter or blotting paper sheets - as large as possible. Wooden...
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    Red, White and Blue

    ​Description A solution of ammonia is poured into each of three beakers which contain (unknown to the audience) a little phenolphthalein, a little lead nitrate solution and a little copper sulfate solution. The beakers' contents turn red, milky white and deep blue respectively. Pouring the contents of the beakers into acid reverses the changes to g...
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    Allotropes of Sulfur

    Apparatus ​ Boiling tubes, 2 Test tube holders Conical flask, 250mL Cork, to fit conical flask Beaker, 250mL Beaker, 1L Petri dish or watch glass. Microscope - ideally a projection or video microscope. Bunsen burner, tripod and gauze, or electric hotplate Heat resistant mat. Filter paper - about 18cm in diameter. Access to a fume cupboard. Chemical...
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    The "Breathalyser" Reaction

    Description A U-tube is packed with orange crystals of potassium dichromate moistened with dilute sulfuric acid. Air saturated with ethanol vapour is blown or sucked over these crystals which turn from brown to green as the alcohol reduces the chromium (VI) to chromium(III). Apparatus ​ One U-tube (length of arm about 10cm). Each arm should have a ...
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    Movement of Ions During Electrolysis

    Description A petri dish containing sodium sulfate solution and bromocresolpurple indicator (yellow in acid, blue in alkali) is placed on an overhead projector. The solution is electrolysed and a blue colour streaming from the cathode shows the movement of hydroxide ions. These can be deflected by a magnetic field and shown to obey the left hand mo...
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