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Structure 1.1.1—Elements are the primary constituents of matter, which cannot be chemically broken down into simpler substances.


Here are experiments our science specialists have selected to support this IB* topic.

Effect of Temperature on Solubility of a Salt

Experiment #12 from Chemistry with Vernier

In this experiment, you will

  • Study the effect of changing temperature on the amount of solute that will dissolve in a given amount of water.
  • Plot a solubility curve.

True Colors: Separating Food Dyes

Experiment #08 from Food Chemistry Experiments

  • Observe the absorbance spectrum of a soft drink.
  • Conduct a liquid-chromatographic separation.
  • Observe the spectra of the components of the separation.
  • Compare the spectra of commercial dyes to determine which dyes were used to make the drink.

Educational Standard
International Baccalaureate (IB) 2025
Organizing concepts
Structure 1. Models of the particulate nature of matter
Structure 1.1—Introduction to the particulate nature of matter
Standard level and higher level

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.