| Videos: 12 results |
Chiral and Achiral Objects
A snail shell, pencil, glove, hand, and molecular models are shown with their mirror reflections.
Chirality / Optical Activity
|
Polarized Light and Organic Molecules: Everyday Objects
The liquid crystal display of a calculator and several plastic objects are examined between polarizing filters.
Chirality / Optical Activity
|
Polarized Light and Organic Molecules
Polarizing filters and the rotation of polarized light by chiral compounds are demonstrated and a polarimeter is shown. Several everyday objects are examined between polarizing filters.
Chirality / Optical Activity
|
Chirality
A series of chiral and achiral objects, the interaction of polarized light with organic molecules, the assignment of R- and S- configuration, Fisher projections, and a stereospecific reaction are demonstrated.
Chirality / Optical Activity |
Stereochemistry
|
Glyceraldehyde and the Fischer Projection
Molecular models are used to demonstrate chirality of glyceraldehyde and drawing its Fischer Projection.
Chirality / Optical Activity |
Stereochemistry |
Molecular Properties / Structure
|
Centrifuging a Sample John W. Moore, Jerrold J. Jacobsen, Lois M. Browne, John F. Zimmerman
The demonstration on this page shows a technique that should not be used by undergraduate chemistry laboratory. This video shows what happens to sample in a centrifuge while the centrifuge is on, and the result of stopping the centrifuge improperly. A narrative is included in this video: The centrifuging process allows the solvent to completely settle out. The jarring caused by hand braking destroys the distinct separation between supernatant and solid.
Separation Science |
Laboratory Equipment / Apparatus
|
Centrifuge
Centrifuging safety considerations, centrifuging a sample, loading and unloading a centrifuge, removing the supernatant, and washing the precipitate are discussed and demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Extraction
Use of a separatory funnel to carry out extraction is demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Filtration
Gravity and vacuum filtration are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Recrystallization
Recrystallization procedures using a single solvent and using two solvents are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Separating and Purifying
Laboratory processes frequently used to separate mixtures or purify substances including centrifuging, chromatography, distillation, extraction, filtration, and recrystallization are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
|
Chromatography
Chromatographic techniques including the gas chromatography, paper chromatography, and thin layer chromatography are demonstrated.
Chromatography |
Separation Science |
Laboratory Equipment / Apparatus
|
