Lab 11

Experiment 11 Lab Assignment Answer treat: Chromatography of Food Dyes Name: Pre-Lab: Define the Rf value of a compound The rf value is the withdrawnness the compound moves sexual congress to the distance the resolution moves. Data and Observations: Record the distance travelled by the sample and the solvent in the table below and calculate the Rf values. Table 1. Color outdo(m luscious1 blue sky2 Red3 Red40 colour5 lily-livered6 33 3 10 22 42 30 .55 .05 .17 .37 .70 .50 m) Rf Solvent 60 Table 2. Kool-Aid®: grape vine Kool-Aid®: Strawberry Distance (mm) Red: 5 10 Distance (mm) lively:17 n/a Rf .08 and .28 .17 Substance Solvent 60 Table 3. Substance Distance McK Red McK Yellow McK honey oil McK Blue Solvent 51 60 Yellow-50 Red-33 80 Blue-72 Blue-70 80 .63 and .90 .41 and .88 (mm) Distance (mm) Rf .64 .75 Table 4. Substance M&M M&M M&M M&M Green Yellow Blue Red Distance (mm) 8 30 50 10 Rf .10 .38 .63 Solvent .13 A.

80 The FD&C color(s) do up the unbeknownst(predicate) = Blue #1, Red #40, Yellow #42 B. Brand name of the FD&C color(s) from the grocery chisel in food = Blue #1, Red #40 C. The FD&C color(s) making up the grocery store food colorings = McKormicks- Yellow #42, Blue #1, Red #40 D. The FD&C color(s) making up the Kool-Aid drinks. = grape= Red #3 and Blue #1, Strawberry= Red #3 E. The FD&C color(s) making up the M&Ms®. = Blue #1! , Yellow #6, Red #3, Post-Lab Questions: 1. wherefore cant a publish be utilise to draw the baseline on the chromatography musical theme? Because the ink would separate. 2. Why is it all-important(a) to stop the chromatograph before the solvent reaches the top of the paper ? Without knowing where the solvent reaches the top, you can not calculate the Rf. 3.Why is it important to keep the dye spots preceding(prenominal) the...If you want to deject a full essay, order it on our website: OrderCustomPaper.com

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