Chemical reaction
principle
The transformation of substances by rearranging bonds.
Principles and materials it uses
- Atomic theory — uses. A rearrangement of atoms.
Where it is used
- General anaesthesia — is used in. Ether and chloroform are chemical agents.
- Aspirin — is used in. It is synthesized by acetylating salicylic acid.
- PCR — is used in. An enzymatic reaction.
- Fluoride — is used in. It strengthens enamel.
- Salting — is used in. Salt draws out water, suppressing microbes.
- Photosynthesis — is used in. Photochemistry.
- Litmus — is used in. Colour from acidity.
- Dry cleaning — is used in. Solvents.
- Acetylene — is used in. Calcium carbide + water.
- Carbon capture — is used in. Absorbing CO₂.
- Percussion cap — is used in. Mercury fulminate explodes when struck.
- Match — is used in. The head flares up from a chemical reaction set off by friction.
- Capsule — is used in. The shell dissolves in the stomach.
- Tablet (medicine) — is used in. A tablet dissolves in the body.
- Airbag — is used in. The gas comes from an instant reaction of sodium azide.
What it is a kind of
- Oxidation — includes. A kind of reaction.
- Fermentation — includes. A biochemical reaction.
- Catalysis — includes. Speeding up a reaction.
- Tanning — includes. Chemical treatment of the proteins in hide.
- Electrolysis — includes. Electrolysis is a chemical reaction driven by an electric current.