Dissolving, Precipitation and Complexation (Chemistry: Molecular World of Reactions in Water Series Part 2) 2003
Distributed by Chip Taylor Communications, 2 East View Drive, Derry, NH 03038-4812; 800-876-CHIP (2447)
Produced by VEA Productions, Inc.
Directed by Dr. Roy Tasker
VHS, color, 15 min.
Sr. High - Adult
Chemistry
Date Entered: 03/17/2004
Reviewed by A. Ben Wagner, Arts and Sciences Libraries, University at Buffalo, State University of New YorkA surprising number of aqueous chemistry principles are packed into this short video. The program examines 1) dissolution of sodium chloride crystals in water; 2) the reaction of solutions of sodium chloride with silver nitrate to form a silver chloride precipitate; and 3)aqueous ammonia addition to copper(II) nitrate solution, forming a copper(II) hydroxide gel which rapidly transforms to the dark blue tetraammonium copper complex. Each transformation is shown at a lab scale in test tubes followed by an exceptionally clear description and visualization (animation) at a molecular level. Helpful summaries are provided at the end of each section. This video would make an ideal classroom introduction to simple laboratory experiments exploring these topics. One small concern is that the dissolving of sodium chloride in water, typically regarded as a physical transformation, is briefly referred to as a reaction.
The program is the second part of a three part video series entitled Chemistry: Molecular World of Reactions in Water. Part One of the series is entitled Water: A Molecular Substance while Part Three is Ionic Equilibrium, Acid/Base, Oxidation/Reduction Chemistry. Chip Taylor Communications distributes a second series, Chemistry: Material World, that covers molecular motions, elements, compounds, mixtures, and reactions.