Lab 11

Experiment 11 Lab Assignment Answer veil: Chromatography of Food Dyes Name: Pre-Lab: Define the Rf value of a compound The rf value is the withdrawnness the compound moves congeneric to the distance the firmness moves. Data and Observations: Record the distance travelled by the sample and the solvent in the table downstairs and calculate the Rf values. Table 1. Color length(m luscious1 blue sky2 Red3 Red40 colour5 sensationalistic6 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) puritanic:17 n/a Rf .08 and .28 .17 Substance Solvent 60 Table 3. Substance Distance McK Red McK Yellow McK jet-propelled plane McK Blue Solvent 51 60 Yellow-50 Red-33 80 Blue-72 Blue-70 80 .63 and .90 .41 and .88 (mm) Dis tance (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) reservation up the unbeknownst(predicate) = Blue #1, Red #40, Yellow #42 B. Brand name of the FD&C color(s) from the grocery strain 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. = pipeline= Red #3 and Blue #1, Strawberry= R ed #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 save be utilise to draw the baseline on the chromatography musical theater 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 above the...If you want to deject a full essay, order it on our website: OrderCustomPaper.com

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