System Requirements User Forum Buy Now! (U.S. – Non-U.S.)

Titration Techniques is a laser videodisc that includes 20 lessons and demonstrations of laboratory techniques relating to titration. It is suitable for use in introductory chemistry classes at high school or college level. As much as possible, the techniques are shown close up, full screen, focusing attention on a "single point lesson" (see Fig. 2). Each video scene has been selected because it illustrates an important aspect of laboratory technique that can be shown to students prior to doing titrations in the chemistry laboratory. Showing this video to students as a pre-lab activity will help make their brief time in the laboratory more effective and safe. The video materials are certain to stimulate students' curiosity and help them learn.

A clip from a video demonstrating the difference in performance between a dirty buret and clean buret. Click play to view QuickTime video. (645 KB)

Jerrold J. Jacobsen, Kelly Houston Jetzer, and Néha Patani
University of Wisconsin-Madison, Madison, WI 53706-1396

John Zimmerman
Wabash College, Crawfordsville, IN 47933

Gerald Zweerink
Missouri Western State College, Saint Joseph, MO 64507

Side 1

• Titration: what it is. A simple titration; Acid-base titration animation; A brief redox titration; Redox titration animation; A complete acid-base titration.
  
• Titration techniques. Hand technique variations; Stopcock; Using a buret to measure liquid volumes; Wait before reading meniscus; Dirty and clean burets; Read meniscus at eye level (see Fig. 1); Meniscus viewing techniques--light colored liquids; Meniscus viewing techniques--dark liquids; Using a magnetic stirrer; Rough titration; Significant figures; Approaching the end point; End point colors; Titration with a pH meter; Titration curves; Colors of indicators.
  
• Meniscus values. Buret meniscus values; Pipet meniscus values; Graduated cylinder meniscus values.

Side 2

• "Bloopers". Introducing the people; Titration animation; Inspecting the buret; Rinsing the buret with water; Preparing a solid sample; Obtaining a liquid sample; Delivering a liquid sample with a Mohr pipet; Pipetting a liquid sample with a Mohr pipet; Rinsing the Mohr pipet with sample; Using the Mohr pipet to transfer sample; Delivering a liquid sample with a volumetric pipet; Pipetting a liquid sample with a volumetric pipet; Rinsing the volumetric pipet with sample; Using the volumetric pipet to transfer sample; Obtaining the titrant; Rinsing the buret with titrant; Filling the buret with titrant; Adding the indicator; The initial reading; Beginning the titration; Delivering titrant; The final reading.