Chemistry

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Chemistry

By | Jan. 2013
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1.Describe generally what happened to each spot of each type of ink. Which had the most pigments? Answer:
After placing the vials of the three ink colors, red, black, and green. The paper chromatography did show the three inks could be separated into variety of colors. Each ink had its own variety of pigments. The most pigments were to be found in the black ink. Then, the green ink and lastly, the red ink. The colors from each spot of each ink type separated from the bottom to the top. Each ink moved at different speeds. Causing the inks to move faster in water and slower in vegetable oil.

(5 points)
2.Compare the effectiveness of each of the four kinds of solvents. Answer:
The four kinds of solvents were water, water-alcohol mixture, alcohol, and vegetable oil. The water solvent had the most effect of carrying the color pigments the furthest and causing the chemicals to separate on the filter paper. The effectiveness of the water-alcohol mixture was the second furthest and was close to being equal to the water solvent. The alcohol solvent had the effectiveness of being the third. Last was the vegetable oil. It didn’t effect the chromatogram that much as the other solvents did. It moved a little but it stayed in the stationary phase at the beginning of the separation while the other solvents were already in their mobile phase.

(5 points)
3.Which solvent caused the ink from the dots to move the most? Which solvent caused the ink from the dots to move the least? Answer:
Water solvent caused the ink from the dots to move the most because it is a highly polar solvent. While the vegetable solvent caused the ink from the dots to move the least because it is a very nonpolar solvent.

(5 points)
4.What differences did you observe in how the different colored inks were separated? Answer:
The different colored inks were separated very differently because the patterns of the ink were very different. Some inks had many color pigments as...