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GOAL: synthesize indigo and dye fabric swatches containing multiple types of fabric to observe the different colors or qualities that can be obtained with one dye, as well as compare different dyes and dyeing methods.
Dyes and pigments are colorful compounds used to change the appearance of objects. Nature produces them to make flowers attractive to insects and to people, to tell predators to back off and to catch the sunlight for energy.
color range of common anthocyanidins (plant pigments)
Indigofera suffruticosa
Humans have learned to use such naturally colored substances from a very early time, but it was not until the past century or so that we discovered how to make our own dye molecules!
the condensation of o-nitrobenzaldehyde and acetone under basic conditions to yield blue-indigo
How to complete this remote lab
How to complete this remote lab
On the pages that follow, read the captions, check out the photos, and watch videos
TAs assign each pair a mass of o-nitrobenzaldehyde (for part C)
Calculate the theoretical yield of blue indigo in mmol and mg
Click the buttons/pictures to move on to the next step
Record data and observations
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Assignment checklist
Assignment checklist
Exp 6 Pre-Lab quiz
Exp 6 Lab Notebook pages
Remote Lab Makeups - attend any instructor's office hours before the report due date
Exp 6 Lab Report
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