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December 8, 2013

Chromatography of Food Dyes

Experiment 11 Lab Assignment Answer analyze: Chromatography of Food Dyes Name: Pre-Lab: Define the Rf value of a compound: It is the distance traveled by the compound unconnected by the distance traveled by the resultant billet front. data and Observations: Record the distance travelled by the essay and the solution in the table below and calculate the Rf values. slacken 1. Color| bad1|Blue2|Red3|Red40| lily-livered5| color6| root| infinite(mm)|50mm|0mm|10mm|21mm|28mm|23mm|50mm| Rf|1|0|0.2|0.42|0.56|0.46|1| Table 2. center of attention|Kool-Aid®: Grape|Kool-Aid®: Strawberry|Solvent| outdo (mm)| 19mm(red)|28mm(red)|48mm| outperform (mm)| 47mm(blue)||48mm| Rf|0.39 & 0.98|0.58|1| Table 3. centre| computer memory Red| submit Yellow| strain Green|Store Blue|Solvent| Distance (mm)|33mm|30mm|34mm(yellow)|50mm|50mm| Distance (mm)|||50mm(blue)||50mm| Rf|0.66|0.60|0.68 & 1|1|1| Table 4. Substance|M&MBrown|M&M Yellow|M&MBlue|M&MRed|Solvent| Distance (mm)|20mm|25mm|5mm|13mm|50mm| Rf|0.40|0.50|0.10|0.26|1| A.The FD&C color(s) do up the unknown region = Red and Blue. B.Brand name of the FD&C color(s) from the grocery butt in pabulum = Market pantry C.
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The FD&C color(s) devising up the grocery store food colorings = Red #40, Blue #1, Yellow #5, Yellow #6. D.The FD&C color(s) making up the Kool-Aid drinks. = Red #40 and Blue #1. E.The FD&C color(s) making up the M&Ms®. = Yellow #6, Yellow #5, Red #40, Blue #1, Blue #2. Post-Lab Questions: 1.why cant a pen be used to draw the baseline on the chromatography wallpaper? Because the ink would bleed as well and index cont! aminate the results. 2. Why is it consequential to stop the chromatograph before the solvent reaches the top of the paper ? Because if the solvent gets to the top, I could miss the quantity points because they would keep moving. 3.Why is it important to keep the dye spots preceding(prenominal) the solvent level? Because the dye spots, upon...If you want to get a full essay, order it on our website:

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