A N A L Y T I C A L   C H E M I S T R Y   2 5 6
R O L E - P L A Y I N G   L A B

1998-1999 Academic Year
©Prof. John P. Walters
St. Olaf College
Northfield, MN 55057

Introduction to Role-Playing and Laboratory Computing
Defining the Kinds of Role-Playing Responsibilities
Round-Robin Certification of Laboratory Glassware


Statistical/Chemical Evaluation of Lead Data
Semi-Automated Weak Acid Titration
Graphical Analysis of Weak Acid Titration
Designing a Mock Robot Experiment
Executing the Mock Robot Experiment
The Incredible Edible Easter Egg Grass Advertising Dilemma
The Downsizing Dilemma
The Broken Pill Coating Machine Assembly Line Shutdown Dilemma
The Instrument Purchase Payment Release Dilemma


Manager: Designing Round Robin Statistics and Scheduling the Experiment
Chemist: Forming and Digesting the Lead Precipitates
Software: Spreadsheet Organization for Round Robin Testing
Hardware: Filtering, Drying Ppts, Making a Cable, and Connecting the Balance


Under the umbrella of designing an acceptable, humane method of production quality control for lead pastes in battery plates, a prototype chemical system is explored for flaws in its implementation. The method calls for a statistically valid comparison of homogeneous vs. heterogeneous precipitation techniques, an investigation of crystal sizes, a comparison of glassware drying techniques, and the actual generation of data to be used in round robin testing. The multitude of short attention span tests calls for a high degree of organizational planning to avoid technician demoralization due to "hurry and wait" lab situations, while also retaining quality. Constant weight gravimetric conditions are determined by computer plotted cooling curves.


The interview has two parts. The first part concerns management of lab time and resources. The second concerns management of data in the round robin tests. Lab complications due to chemical waste disposal, spills, and other technique problems must be considered. Special attention has to be directed to time management and close communication between role players. Time required for glassware drying and the investigation of alternate techniques are key discovery issues.

lead filtration