Limiting Reactants: Industrial Case Study
Students are assigned as "consultants" to evaluate competing manufacturing processes based on reactant ratios, percent yield, and refining/waste disposal costs. Three competing models are proposed. Directions are open-ended.
Context for Use
Description and Teaching Materials
The students evaluate mass ratios for making NiO from nickel nitrate and NaOH. Postulated costs for raw materials are given. Three mass ratios are suggested, with different percent yields and different costs for refining the crude product to salable nickel oxide. Students are asked to choose the best of the three given ratios and explain what criteria they used for their choice; and to come up with the "ideal" ratio from stoichiometric concepts.
Assignment handout with instructor comments (Microsoft Word 64kB Oct27 08)
Teaching Notes and Tips
Students will get stuck if they can't figure out the mass ratios and significance of percent yield. The instructor's observations and coaching during the exercise are the key feedback mechanism.