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Principles of Polymer Chemistry: Monomers, Polymers, And Macromolecules An Overview (Lect 1) Polymers are very interesting materials. Although polymers are one of the building blocks of life on Earth, we only recently understood their nature. The origin of the word “polymer” comes from the Greek word “polymeros,” which means “many parts.” Polymers are formed by linking small monomers, from the…

Fundamental Chemistry: Moles and Concentration Calculations Course (14) Precipitation reactions occur when aqueous solutions react to produce a solid precipitate. These equations can be simplified similarly to ion equations. Initially, we list the ions participating in the reaction, then remove the ions that don’t get involved in the formation of the precipitate. Exercise 1 Write the…

Course Chemical Bonds: Covalent Bonding and Shapes of Molecules (19) Hybridization sp2 Hybrid Orbitals—Bond Angles of Approximately 120° In sp2 hybridization, the s orbital hybridizes with two p orbitals. We say “2” indicating the number of involved p orbitals. Notice, this leaves one p orbital unhybridized. This orbital typically forms the pi covalent bond. Here, carbon is sp2 hybridized,…