Students will determine the rate law for the reaction of crystal violet and sodium hydroxide. Students will also prepare dilutions of stock crystal violet solutions to generate a Beer’s law calibration curve. This lab will require students to integrate prior chemistry knowledge involving spectroscopy, Beer’s law, solution dilution, calibration curves, and chemical kinetics. The activity contains enough materials for 15 groups of students as well as a Teacher’s Guide and Student Study Guide Copymasters. Meets Big Idea 4, Investigation 11, Primary Learning Objective 4.2.
1500mL Crystal Violet, 1%
1500mL Sodium Hyroxide, 0.2M
1000mL Deionized Water
Materials needed but not supplied:
Spectrophotometers w/ Cuvettes
Stopwatches or Lab Timers
UN1824, Sodium hydroxide solution, 8, II, Ltd Qty
WARNING: This product can expose you to chemicals including Crystal Violet, which is known to the State of California to cause cancer. For more information go to http://www.P65Warnings.ca.gov.