MIDTERM 03 - Surface Tension Flashcards
Refers to the property of the surface of the liquid that causes the surface partition of the liquid to be attracted to another surface
Surface tension
Title of Experiment 4
Surface tension determination
2 units of surface tension
dynes/cm, d/sec^2
Are substances that reduce surface tension
Surface active agents
Refers to wetting agents that lower the surface tension of a liquid, allowing for easier spreading and lower interfacial tension between 2 liquids
Surfactant
Refers to the tendency of certain dissimilar to cling together due to attractive forces
Adhesion
Refers to a physical property of a substance caused by the intermolecular attraction between like molecules within a body or substance that acts to unit them
Cohesion
Symbol for surface tension
γ (Gamma)
If the charge of the head of a surfactant is negative, the surfactant is __________
Anionic
If the charge of the head of a surfactant is positive, the surfactant is ___________
Cationic
If the surfactant carries a head with 2 oppositely charged groups, it is __________
Zwitterionic
If the head of the surfactant is not charged, it is __________
Non-ionic
Sodium dodecyl sulfate and perfluorooctane sulfate are examples of __________ surfactants
Anionic
Benzalkonium chloride and cetylpyridinium chloride are examples of __________ surfactants
Cationic
Dodecyl betaine and cocanidopropyl are examples of __________ surfactants
Zwitterionic
