11.3: Lab Report
Part I: Identifying Food Dyes in Candies
Results
|
Color skittle |
Maximum Absorbance |
Wavelength (nm) at Maximum Absorption |
Proposed Dye |
Wavelength (nm) of Maximum Absorption for Proposed Dye |
|---|---|---|---|---|
|
Red |
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|
Orange |
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|
Yellow |
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|
Green |
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|
Purple |
Study Questions
- Name the parts of the spectrophotometer and identify their function.
2. What is the difference between % transmittance and absorbance?
3. How did you determine which wavelength was absorbed at the highest level? How is this process useful in determining the identity of a molecule?
4. How do you clean a cuvette?