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Homemade firefighting foam

We can produce carbon dioxide gas using sodium hydrogen carbonate and acetic acid. The carbon dioxide puts out the flame.

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Fading raspberry juice

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Endothermic reaction

Barium hydroxide reacts with ammonium nitrate while absorbing heat from their surroundings.

Molecule exercise VII (Organic nitrogen compounds)

An exercise about the groups and structure of organic nitrogen compounds.

The effect of concentration on chemical equilibrium

Examining the colour of cobalt(II) chloride in water and hydrochloric acid.

The surface tension of liquids (observation)

We observe whether a razor blade can float on the surface of different liquids.

Surface tension of liquids 2

In this video we are experimenting with food colourings.

How long have we used fire?

In this lesson you will learn about the history of fire and the conditions necessary for...

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