Advanced PlacementCollege / Chemistry

Kinetics of Crystal Violet Fading (Colorimeter)

Students determine the reaction order of crystal violet fading in the presence of sodium hydroxide.

This version of the experiment is conducted with a wireless colorimeter. A calibration curve of crystal violet is generated and optimal absorbance wavelength determined by the student. Crystal violet fading is investigated using different concentrations of sodium hydroxide.


Student Files

11A_ACI_Kinetics_of_Fading_Colorimeter_S.docx 1.14 MB
11A_ACI_Kinetics_of_Fading_Colorimeter_S.pdf 1.47 MB
KineticsCrystalVioletFadingSampleData.spklab 60.74 KB

Teacher Files

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Standards Correlations

IB Topics AP Topics
6.1; 16.1; 16.3 TRA-3.B; TRA-3.C; TRA-3.A

Watch Video

Kinetics of Crystal Violet Fading - Distance Learning Lab

Kinetics of Crystal Violet Fading - Distance Learning Lab

How can we determine the order of a reaction from its kinetics? DOWNLOADS data file & student lab: SPARKvue...

Featured Equipment

Colorimeter and Turbidity

Wireless Colorimeter & Turbidity Sensor

This sensor can function as a turbidimeter or colorimeter and is capable of measuring absorbance and transmittance at six different wavelengths.

Many lab activities can be conducted with our Wireless, PASPORT, or even ScienceWorkshop sensors and equipment. For assistance with substituting compatible instruments, contact PASCO Technical Support. We're here to help.

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Source: Lab #11A

Advanced Chemistry through Inquiry

Kinetics of Crystal Violet Fading (Colorimeter)