Peeling an egg

The acid in vinegar dissolves materials containing calcium carbonate like eggshell and snail shell.

Related extras

Exothermic reaction

When heated, powdered sulphur reacts with powdered zinc, releasing heat.

The viscosity of liquids (observation)

Have you ever thought about why honey flows so slowly from a spoon compared to water?

Molecule exercise VII (Organic nitrogen compounds)

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

Dissolution of NaCl

Common salt is dissolved by water: polar water molecules form a coat around the ions.

The viscosity of liquids

Have you ever thought about why honey flows so slowly from a spoon compared to water?

Covalent bonds in benzene molecules

In benzene there are sigma bonds and delocalized pi bonds between carbon atoms.

Homemade firefighting foam

We can produce carbon dioxide gas using sodium hydrogen carbonate and acetic acid. The carbon...

A non-flammable tissue

Go behind the scenes of gastronomy and film tricks: objects in flames do not always burn, do they?

Added to your cart.