1. What is the origin of the colors of the ink in the pens? Is the...
1. What is the origin of the colors of the ink in the pens? Is the ink made up of several dyes or just one? How do the colors of the dyes which are used result in the color of the ink which we observe?
This question is from our chromatography lab where we saw the different color dyes in each pen. I know it has to do with their polarity, but I'm not sure why the different colored dyes are used and what the origin of the colors of the ink are. Please help. The three pens we used were a sharpie, vis-a-vis, and papermate. The papermates chromatogram showed purple and black and the the vis-a-vis showed yellow, pink, and blue.
2. Using the information you gained in this experiment, design an experiment that could be used to tell the difference between lipstick smudges left at a crime scene?
- How could we tell who was the perpetrator?
- Could water be used as a mobile phase? Why or why not?
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1. What is the origin of the colors of the ink in the pens? Is
the...
1-4 1. What would happen if you used a water-soluble pen on the chromatography paper to...
1-4
1. What would happen if you used a water-soluble pen on the chromatography paper to mark your origin line? How would this affect the Re values? 2. A student accidently adds 17 ml of NaCl to their beaker rather than the 7 mL of NaCl they were suppose to add to their beaker. How might this mistake affect their chromatogram? Do you think they would be able to obtain any data? Briefly explain your answer. 10 3. Is it...
Background In this lab, we are going to learn how to use a powerful separation technique...
Background In this lab, we are going to learn how to use a powerful separation technique called chromatography which can separate compounds that are quite similar to one another. Chromatography is a general type of separation in which a mixture of compounds passes through a stationary phase. Different compounds have different relative affinities for the mixture traveling along the stationary phase, or the mobile phase, and the stationary phase, causing these compounds to separate from one another. More specifically, we’re...
Post-Lab Questions 1. Why must you use a pencil, and not ink or felt-tip pen, to...
Post-Lab Questions 1. Why must you use a pencil, and not ink or felt-tip pen, to mark on the paper the origin of the spots of the amino acid preparations? 2. In this experiment, suppose you forgot to mark the position of the solvent front when you tested the hydrolysate of aspartame against the other amino acids. a. Is it still possible to determine how many amino acids were present in the hydrolysate? Explain your answer. b. Could you still...
Chromatography: Separating Mixtures Introduction: Magic marker inks are often mixtures of several compounds. Paper chromatography is...
Chromatography: Separating Mixtures Introduction: Magic marker inks are often mixtures of several compounds. Paper chromatography is a common method of separating various components of a mixture. After separation, you can observe the different colors that make up a particular color of magic marker ink. You can also calculate a ratio Rf, which compares how far each compound traveled to how far each solvent (substance that dissolves another substance) traveled during the experiment. Rf = Ds/Df Ds = Distance traveled by...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography?...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
1) Write a Reaction equation using 4- aminobenzenesulfulfonic acid (aniline derivative) and 8-ani...
1) Write a Reaction equation using 4- aminobenzenesulfulfonic
acid (aniline derivative) and 8-anilino-1-naphthalenesulfonic acid
(coupling agent). Write the mechanism.
SYNTHESIS OF AZO DYES INTRODUCTION Humans' love of color dates back almost to prehistoric times, yet it is not actually until the modern era that the full range of the rainbow has been accessible to the majority of people irn their clothes and other textiles. Ancient or medieval times have often been described as being quite splendid with their "tyrian purple"...
Standardized Test Practice Cumulative Multiple Choice 1. Which color of flower is most likely to attract...
Standardized Test Practice Cumulative Multiple Choice 1. Which color of flower is most likely to attract noc 5. Which hormone stimulates the ripening of fruit? turnal pollinators such as bats and moths? A. auxin A. blue B. cytokinins B. red C. ethylene C. violet D. gibberellins D. white Use the diagram below to answer question 6 Use the illustration below to answer questions 2 and 3. 2. How would you describe the body symmetry of the animals shown in the...
1/ Consider the following table. Defects in batch Probability 2 0.18 3 0.29 4 0.18 5...
1/ Consider the following table. Defects in batch Probability 2 0.18 3 0.29 4 0.18 5 0.14 6 0.11 7 0.10 Find the standard deviation of this variable. 1.52 4.01 1.58 2.49 2/ The standard deviation of samples from supplier A is 0.0841, while the standard deviation of samples from supplier B is 0.0926. Which supplier would you be likely to choose based on these data and why? Supplier B, as their standard deviation is higher and, thus, easier to...
While reading the story, consider the culture (or sub culture) and related communication styles the story...
While reading the story, consider the culture (or sub culture)
and related communication styles the story reveals.
Consider too, possibly, the values, behavioral norms, social
practices, social artifacts, etc.
After reading the story through the lens of this idea, please
compose a full academic length (evidence-based 7 to 11 sentence
long) paragraph which addresses the following prompt:
What does the story reveal about the culture it portrays
and/OR the communication styles the culture shares?
In other words, what does the...
For the preparation and standardization of NaOH with KHP im supposed to boil water for 1hr and 30 min to remove CO2
For the preparation and standardization of NaOH with KHP im supposed to boil water for 1hr and 30 min to remove CO2....the problem is that if I don't boil it for that long and (30 min) b/c of not enough time but I put the water I boiled for 1/2 hr aproximately into a NaOH bottle with a CO2 absorber and stored it there for a few days. I would assume that I would have to boil the water again...but...
1-4
1. What would happen if you used a water-soluble pen on the chromatography paper to mark your origin line? How would this affect the Re values? 2. A student accidently adds 17 ml of NaCl to their beaker rather than the 7 mL of NaCl they were suppose to add to their beaker. How might this mistake affect their chromatogram? Do you think they would be able to obtain any data? Briefly explain your answer. 10 3. Is it...
Post-Lab Questions 1. Why must you use a pencil, and not ink or felt-tip pen, to mark on the paper the origin of the spots of the amino acid preparations? 2. In this experiment, suppose you forgot to mark the position of the solvent front when you tested the hydrolysate of aspartame against the other amino acids. a. Is it still possible to determine how many amino acids were present in the hydrolysate? Explain your answer. b. Could you still...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
1) Write a Reaction equation using 4- aminobenzenesulfulfonic
acid (aniline derivative) and 8-anilino-1-naphthalenesulfonic acid
(coupling agent). Write the mechanism.
SYNTHESIS OF AZO DYES INTRODUCTION Humans' love of color dates back almost to prehistoric times, yet it is not actually until the modern era that the full range of the rainbow has been accessible to the majority of people irn their clothes and other textiles. Ancient or medieval times have often been described as being quite splendid with their "tyrian purple"...
Standardized Test Practice Cumulative Multiple Choice 1. Which color of flower is most likely to attract noc 5. Which hormone stimulates the ripening of fruit? turnal pollinators such as bats and moths? A. auxin A. blue B. cytokinins B. red C. ethylene C. violet D. gibberellins D. white Use the diagram below to answer question 6 Use the illustration below to answer questions 2 and 3. 2. How would you describe the body symmetry of the animals shown in the...
While reading the story, consider the culture (or sub culture)
and related communication styles the story reveals.
Consider too, possibly, the values, behavioral norms, social
practices, social artifacts, etc.
After reading the story through the lens of this idea, please
compose a full academic length (evidence-based 7 to 11 sentence
long) paragraph which addresses the following prompt:
What does the story reveal about the culture it portrays
and/OR the communication styles the culture shares?
In other words, what does the...
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