| NAME _______________________________________ | Food Dye Postlab, p. 2 |
| 3. |
Suggest several factors that may have influenced the manufacturers decision.
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| 4. |
Explain why the Rf values were much higher in the ethanol-water system.
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| 5. |
Compare your predictions to the results you saw.
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| 6. |
Mark each as TRUE or FALSE. Explain why the false statements are false.
_____ The blue pen contains only 2 components. _____ The red pen definitely contains Red 40. _____ The red pen may contain Red 40. _____ Green 3 is not present in any of the pens. _____ The purple pen has one dye in common with the red pen, and one with the blue pen. _____ The purplish dye is more polar than either Green 3 or Blue 1 _____ We would expect to find FD & C Dyes in the pens. |