Lab 11

Experiment 11 Lab Assignment Answer weather sheet: Chromatography of Food Dyes Name: Pre-Lab: Define the Rf value of a compound The rf value is the withdrawnness the compound moves comparative to the distance the solution moves. Data and Observations: Record the distance travelled by the sample and the solvent in the table down the stairs and calculate the Rf values. Table 1. Color standoffishness(m luscious1 blue sky2 Red3 Red40 colour5 jaundiced6 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) dark-skinned:17 n/a Rf .08 and .28 .17 Substance Solvent 60 Table 3. Substance Distance McK Red McK Yellow McK kibibyte McK Blue Solvent 51 60 Yellow-50 Red-33 80 Blue-72 Blue-70 80 .63 and .90 .41 and .88 (m m) 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) qualification up the unbeknownst(predicate) = Blue #1, Red #40, Yellow #42 B. Brand name of the FD&C color(s) from the grocery store 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. = grapeshot= Red #3 and Blue #1, St rawberry= 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 comedy 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 non 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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