Activities:
- Polar and non-polar compounds
- Emulsions in the kitchen
- Learn how to make Soap
- Learn how to make Lip balm
- Learn how to make a lotion
Conceptual Understandings:
- “Similia similibus solvuntur” (Unknown alchemical dictum) or “Like dissolves Like”.
- Polar and non-polar compounds do not mix unless an emulsifier is used.
Learning Objectives:
- Polar compounds dissolve in polar solvents.
- All ionic compounds are polar.
- Non-polar compounds dissolve in non-polar solvents.
- Covalent molecules are mostly non-polar
- Water is a polar solvent.
- Oil is a non-polar solvent.
- Polar compounds may dissolve in non-polar solvents (and vice versa) if an appropriate emulsifier is used. These types of solutions are called emulsions. Most of the cosmetic products used today are examples of emulsions.
Vocabulary
- Emulsion
- Emulsifier
- Hydrophobic compounds
- Hydrophilic compounds
- Ionic and covalent compounds
- Polarity
- Polar and non-polar compounds/solvents
