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Movie Size - 1.5 MB Movie Duration - 51 Seconds File - CCA6/MOVIES/volumetric/INTRO1_2.MOV

Discussion

The phrase "this video" in the narrative refers to the original videotape from which this segment was taken (Zimmerman, J.; Jacobsen, J. J. Quantitative Techniques in Volumetric Analysis [Videotape]; J. Chem. Educ. Software, 1997, SP 15.). The section of Chemistry Comes Alive! Volume 6 entitled Quantitative Techniques in Volumetric Analysis includes the entire content of the videotape.

Quantitative Techniques in Volumetric Analysis consists of modules containing QuickTime movies, still images, and text covering weighing solid samples, preparing solutions, transferring aliquots with a pipet, and acid-base titration. Components of these modules can be combined to support the laboratory work outlined in classic texts such as:

Douglas A Skoog, Donald M. West, F. James and Holler Fundamentals of Analytical Chemistry, 7^th edition, CITY: Brooks/Cole Publishing Company, 1996. (ISBN: 0-03-005938-0)

Donald C Harris, Quantitative Chemical Analysis, 5^th edition, CITY: W.H. Freeman Company, 1998. (0-7167-2881-8)

The heading "Designed for Classical Quantitative Volumetric Analysis" appears beneath the first movie of each module in order to distinguish the optimum quantitative work demonstrated here from similar techniques that may be used in less demanding settings.

Quantitative Techniques in Volumetric Analysis provides many options. It includes four method of quantitatively weighing a solid sample and two methods of quantitatively transferring a solid to a volumetric flask for solution preparation. In spite of all these options, there may be discrepancies between the exact details shown in the movies and images and specific laboratory practice preferred by some users. In most cases there should be sufficient flexibility in the movies and discussion text to support local variations in technique.

To begin working through the various quantitative modules, we suggest that you click Quantitative (either here or in the navigation links near the top of the page) and then select one of items from the menu that appears.

Narrative

This video demonstrates various techniques of quantitative weighing and transferring solids, transferring liquids and volumetric titration. Even highly automated processes rely on these traditional techniques. In this laboratory instrument, a robotic arm delivers a sample to an analysis center, while a computer controls analysis conditions.

Part of the process utilizes the classical technique of dilution to the mark of a volumetric flask. Careful technique is still the key to high quality laboratory work. This video has been produced to help students understand and apply proper analytical techniques.