All Resource articles – Page 15
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ResourceReflux with addition
A reactant is added to the refluxing reaction mixture in a controlled way via an addition funnel. This can be done to prevent exothermic reactions getting out of control. Video: Reflux with addition video
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Science concept cartoons: what holds atoms together?
Spark discussion and stimulate thinking about what holds atoms together in a way that encourages pupils to share their ideas.
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Asparagus pee
A video explaining that asparagus should be cooked in butter rather than water because the molecules responsible for its flavour are water-soluble, and a worksheet about the molecules responsible for ‘asparagus pee’.
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On This Day – Sep 30 : Discovery of oxygen
Unfortunately the letter from the Swedish chemist was never acknowledged and Joseph Priestley published the discovery first. Scheele was trounced in the announcement of other discoveries as well. For this reason, Isaac Asimov nicknamed him “hard-luck Scheele”.
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Some reactions of sulfur dioxide
Observe the reactions of sulfur dioxide with potassium manganate (IV), iodide/iodate mixture and indicator solution
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Measuring density
Determine the density of seawater and tap water by measuring their relative mass and volume
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The chemistry of thiosulphate ions
Find out about some interesting chemical reactions of sodium thiosulphate
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The oxidation of cyclohexanol by nitric acid
Perform a ring opening oxidation using nitric acid to produce the dicarboxylic acid, 1,6-hexanedioic acid (adipic acid) – and then use the solid crystals that form to determine a melting point
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Chromium, molybdenum and tungsten
Demonstrate aspects of colour, precipitate formation, changes in oxidation state and equilibria for transition elements
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The chemical properties of hydroxybenzene
Observe and interpret some of the chemical reactions of hydroxybenzene (phenol) inside a plastic petri dish
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Redox chemistry with dichromate ions
Observe the colour changes that occur with the reduction of dichromate ions by hydrogen peroxide
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Apparatus and techniques for microscale chemistry
Find out what apparatus you need for common microscale experiments, learn about key techniques and discover how to prepare solutions of different elements.
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Chemistry and Sport - Swimming
Explore the halogens, their salts, and their relation to swimming.
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Properties of group 2 elements
Observe and interpret the changes when drops of various anion solutions are added to drops of group 2 element cations
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Oxygen and methylene blue
Test for oxygen gas produced from the reaction between hydrogen peroxide and potassium manganate (VII) using methylene blue solution
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Energy changes in neutralisation
Study energy changes in two chemical reactions by performing the experiment on temperature strips
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Formation of TCP (2,4,6-trichlorohydroxybenzene)
Prepare a distinctive-smelling sample of TCP by reacting hydroxybenzene (phenol) with chlorine gas
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The microscale synthesis of indigo dye
Carry out a microscale organic synthesis to produce indigo dye
