All Investigation articles – Page 11

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Which sodium salt is which?

How does sodium interact with other chemicals, and how can you identify them? Includes kit list and safety instructions.
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Which gas is which?

Five mystery gases, and a problem to solve. Students must identify each gas, and do so quickly. Includes kit list and safety instructions.
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What makes the candle go out?

Why do candles go out, how do different candles react in the same environment, and can we figure out why they’re different? Includes kit list and safety instructions.
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What is honey made of? The optical rotation of sugars

Discover more about carbohydrates, chirality, optical rotation, in honey. Includes kit list and safety instructions.
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Vintage titrations: tannin in wine

Explore Redox titrations using potassium manganate(VII), with this tannin experiment. Includes kit list and safety instructions.
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Vintage titrations: sulfur dioxide concentrations in wine

Explore redox titrations using iodine, and discover the sulfur dioxide concentrations in wine. Includes kit list and safety instructions.
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Three isomeric alcohols

Learn about the reactions of primary, secondary and tertiary alcohols, using laboratory tests. Includes kit list and safety instructions.
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Only dust - is there a sign of life?

Discover the link between organic life, and dust, designing an experiment of your own from junk materials. Includes kit list and safety instructions.
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Number of reactions

Explore the chemistry of copper, and weak bases, in this explorative experiment in the reactions of copper(II) sulfate. Includes kit list and safety instructions.
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Move a heavy object

Use a simple reaction to create CO₂, and see how far chemistry can push an object. Contains kit list and safety instructions.
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Move an oxo cube at great speed

Make a reaction that creates CO₂, and watch as it propels a stock cube faster than any Oxo has travelled before. Includes kit list and safety instructions.
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Lifting an egg by a thread

Create a strong cellulose thread and lift and egg. Includes kit list and safety instructions.
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Liquid and solid water; the growth of ice crystals

On a cold clear night, the Earth loses heat by radiation. How does a natural pond form ice through the night? Includes kit list and safety instructions.
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The candle in the bell jar

How does oxygen, in a sealed container, react when exposed to fire? Find out with this experiment. Includes kit list and safety instructions.
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From milk to curds and whey - which enzyme?

An experiment, and extension, into enzymes and how they work in dairy products. Includes kit list and safety instructions.
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Finding the ‘rate expression’ for the reaction between iodine and tin

Explore rate reaction between two substances, and design an experiment to measure it. Includes kit list and safety instructions.
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Blanching - what is the most effective method?

Explore enzymes and catalysts in this experiment into fresh food preservation. Includes kit list and safety instructions.
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Cool it | In search of more solutions | 14–16 years

Devise a method of reducing the temperature of water to 6.5°C using citric acid and bicarbonate of soda.
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As sweet as? Detecting aspartame in a table-top sweetener

Use hydrolysis and chromatography to find aspartame in your table-top sweetener. Includes kit list and safety instructions.
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After meal puzzle

Use ingenuity and science to solve the riddle of lifting ice with string. Includes kit list and safety instructions.