Experiment 11 Lab Assignment Answer Sheet: Chromatography of Food Dyes Name: Pre-Lab: Define the Rf value of a compound The "rf" value is the distance the compound moves relative to the distance the solvent 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 Distance(m Blue1 Blue2 Red3 Red40 Yellow5 Yellow6 33 3 10 22 42 30 .55 .05 .17 .37 .70 .50 m) Rf Solvent 60 Table 2. Kool-Aid®: Grape Kool-Aid®: Strawberry Distance (mm) Red: 5 10 Distance (mm) Blue:17 n/a Rf .08 and .28 .17 Substance Solvent 60 Table 3.
Salami $1.70---2.42 8 oz. Tomato & Basil $2.06---2.94 8 oz. Roasted Garlic $1.70---2.42 9 oz. Smokey Cheddar $2.10---3.00 9 oz. Smokey Swiss & Cheddar $2.10---3.00 9 oz.
Then horizontally on the line I just drew I marked off 9 spaces 1.5 cm apart. On one sheet inside the spaces I marked B1, then B2 in the next space and so on for the FD&C food color dyes, at the end I marked KS and KG for Kool-Aid strawberry and grape. On the second sheet of Chromatography filter pater I did the same thing. I made a 1 cm line from the bottom and spaced it off in 1.5 cm spaces. I marked those with the Store Food Colors, the M&M colors and the unknown color.
Experiment 11 Lab Assignment Answer Sheet: Chromatography of Food Dyes Name: Pre-Lab: Define the Rf value of a compound: It is the distance traveled by the compound divided by the distance traveled by the solvent front. 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|Blue1|Blue2|Red3|Red40|Yellow5|Yellow6|Solvent| Distance(mm)|50mm|0mm|10mm|21mm|28mm|23mm|50mm| Rf|1|0|0.2|0.42|0.56|0.46|1| Table 2. Substance|Kool-Aid®: Grape|Kool-Aid®: Strawberry|Solvent| Distance (mm)| 19mm(red)|28mm(red)|48mm| Distance (mm)| 47mm(blue)||48mm| Rf|0.39 & 0.98|0.58|1| Table 3.
A) the rusting of iron B) the condensation of water vapor C) the baking of a potato D) the formation of polyethylene from ethylene E) the explosion of nitroglycerine 3. A term that relates to how well a particular measurement is able to be repeated by a mearuring device is ---------------- A) qualitative B) precision C) phase D) accuracy 4. What is a chemical process? A) melting of lead B) dissolving sugar in water C) tarnishing of silver D) crushing of stone 5. Which one is not a pure substance?
Based on this result, what biological molecules are present in the chocolate chip cookie solution? What is the relationship between monosaccharides and starches? Experiment 3: Lipid Test Fill in the table below with the results from the lipids test experiment. Results Lipids Test Solution Initial Color Color with Sudan Solution corn Oil water What results would you expect from a sudan test of chicken soup? What is the size difference between fat polymers and starch and protein polymers?
Answers: a. 0% b. 100% c. 1 homozygous dominant: 1 heterozygous; 100% tall 2. If Mendel wanted to determine the genotype of a yellow round pea, what would be the best plant to cross it? a. GgWw b. GGWW c. ggWW d. GGww e. ggww Check your work.
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Question: How do different salinities affect a seeds ability to germinate? 2 pt Hypothesis: I hypothesize that the seeds in a lower salinity will germinate more. 2 points Prediction: If seeds are place in a bag with a lower salinity, then they are going to germinate more than those in a higher salinity solution. 2 points Materials: • • 60 red kidney beans solutions of 0.0% salt (tap water), 0.20% salt, 0.6.0% salt, 1.0% salt, 1.5% salt 5 paper napkins New package • • 5 plastic baggies with holes cut in them for
| ok | ok | yes | | n/a | Rk. | 12/1/11 | 12pm | Davisdairy | milk | 4 deg.c | ok | 40litter | ok | ok | yes | | n/a | Rk. | 13/1/11 | 3pm | Poultarypalace | eggs | 12 deg.c | ok | 12dozen | ok | ok | yes | | n/a | Rk. | 13/1/11 | 2pm | Sunshinemarket | Vege.tables | - | ok | 10kg. | ok | ok | yes | | n/a | Rk.