You are tasked with recrystallizing 4-tert-butylphenol: You can only find hexanes and methanol in the lab...
You are tasked with recrystallizing 4-tert-butylphenol: You can only find hexanes and methanol in the lab as solvents. Which one will likely be better and why? Describe briefly how you would test whether this is an adequate solvent.
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You are tasked with recrystallizing 4-tert-butylphenol: You can
only find hexanes and methanol in the lab...
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO HELP FIND THE ANSWERS 1) How would you pick the good sol...
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO HELP FIND THE ANSWERS 1) How would you pick the good solvent for the recrystallization of your chemical? 2) List ten solvents used mostly for recrystallization. Provide in the table physical properties for these solvents that help choosing the best solvent. 3) Why do we use a very cold solvent to wash crystals? 4) Why is it preferable to use vacuum filtration and not regular one for recrystallization?
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO...
You recently joined a biochemistry research lab to study protein functions in diseases. In the lab,...
You recently joined a biochemistry research lab to study protein functions in diseases. In the lab, researchers have been working on a protein kinase, the enzyme that catalyzes the phosphoryl transfer reaction from ATP to the -OH group on serine or threonine residues of the target proteins. The researchers in the lab have found that a point mutation in the gene encoding the protein kinase leads to a change in one amino acid of the enzyme, which causes an increase...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red,...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red, blue areen, and yellow. Think about what you know about colors and predict which of these might be a single colored compound and which ones might contain more than one. write down your prediction. If you have the colors listed and want a purple color, what would you do? 2) Put the following chromatography solvents in order of polarity as a chromatography solvent: acetone,...
Question 3: In a lab experiment, you are tasked with determining the electrochemical reaction that can...
Question 3: In a lab experiment, you are tasked with determining the electrochemical reaction that can occur between aqueous hydrochloric acid (HCl)) and solid magnesium metal (Mg). When the magne- sium is placed in solution, gas bubbles begin to appear around the metal and evolve from solution. (a) Write out the two half reactions that occur when the magnesium is placed in the hydrochloric acid solution. Which species is the getting oxidized? Reduced? (b) Which species is acting as the...
Question 17 1 pts What solubility properties are important in the selection of a solvent for...
Question 17 1 pts What solubility properties are important in the selection of a solvent for recrystallisation? sparingly soluble in hot solvent and readily soluble in cold solvent readily soluble in both hot and cold solvent sparingly soluble in both hot and cold solvent readily soluble in hot solvent and sparingly soluble in cold solvent Question 18 1 pts How would you modify the procedure given in the Laboratory Manual if you did not know which solvent to use? if...
can you please answer all 1. When you run a TLC of the reaction in ethyl...
can
you please answer all
1. When you run a TLC of the reaction in ethyl acetate : hexanes 1:1, the plate below is produced. Give a solvent system that would be expected to produce greater separation and a BRIEF (8 words) justification about your choice. (5 points) 7 6 5 4 3 b. Calculate the R for the bottom spot. (5 points) c. Which compound on the TLC plate is the most polar? (5 points) 2. Why is it...
Identify which one of the seven unknowns is represented in the data given and why Lab...
Identify which one of the seven unknowns is represented in the
data given and why
Lab 8: Instrumental Analysis You are given seven unknowns, all of which are white or brown powders. Use the provided IR and 1H NMR spectra to assign Unknowns 1-7 to the given compounds. Label all spectra and briefly explain how you made your determinations. NH ОН OR foncommon - 0 o-vanillin Benzoic acid p-toluidine 4-tert-butylphenol OH Y OH H2NY COH salicylic acid 9-fluorenol 4-aminobenzoic acid...
organic elin PRE-LAB QUESTIONS 1. Would you expect 4-h Explain and include a b uld you...
organic elin PRE-LAB QUESTIONS 1. Would you expect 4-h Explain and include a b uld you expect 4-hydroxyphenylacetic acid to be soluble or insoluble in 1.0 M NaOH? d include a balanced chemical equation with your answer. Но, 4-hydroxyphenylacetic acid 2. Although testosterone and slightly soluble in methanol at h testosterone and methanol both have a free OH group, testosterone is only coluble in methanol at room temperature. Explain why this is. OH testosterone 2 Draw a flowchart (similar to...
Leader name 4. Methanol is a highly poisonous solvent, chemically similar to ethanol (alcohol) and similar...
Leader name 4. Methanol is a highly poisonous solvent, chemically similar to ethanol (alcohol) and similar in appearance and scent. In the US, methanol poisoning is most likely to occur from Ingestion of windshield wiper fluid or other household or industrial products. Poisoning can also occur from drinking adulterated alcoholic beverages Methanol is broken down to formaldehyde by alcohol dehydrogenase (ADH), and then the formaldehyde is broken down to formic acid by aldehyde dehydrogenase (ALDH). Formic acid is highly toxic...
can you answerthe lab questions 1-5? 1. Explain why methanol and sodium carbonate were both able...
can
you answerthe lab questions 1-5?
1. Explain why methanol and sodium carbonate were both able to dissolve in water, but only sodium carbonate was able to conduct electricity in solution. (3 pts) 2. Look up the chemical structures of methane and methanol. Based on their structures, which of the two do you expect to be water soluble? Explain your answer. (4 pts) 3. What are the main structural differences and similarities between methanol and 1-decanol. Explain the observed difference...
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO HELP FIND THE ANSWERS 1) How would you pick the good solvent for the recrystallization of your chemical? 2) List ten solvents used mostly for recrystallization. Provide in the table physical properties for these solvents that help choosing the best solvent. 3) Why do we use a very cold solvent to wash crystals? 4) Why is it preferable to use vacuum filtration and not regular one for recrystallization?
POST LAB QUESTIONS-USE GOOGLE SCHOLAR TO...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red, blue areen, and yellow. Think about what you know about colors and predict which of these might be a single colored compound and which ones might contain more than one. write down your prediction. If you have the colors listed and want a purple color, what would you do? 2) Put the following chromatography solvents in order of polarity as a chromatography solvent: acetone,...
Question 3: In a lab experiment, you are tasked with determining the electrochemical reaction that can occur between aqueous hydrochloric acid (HCl)) and solid magnesium metal (Mg). When the magne- sium is placed in solution, gas bubbles begin to appear around the metal and evolve from solution. (a) Write out the two half reactions that occur when the magnesium is placed in the hydrochloric acid solution. Which species is the getting oxidized? Reduced? (b) Which species is acting as the...
Question 17 1 pts What solubility properties are important in the selection of a solvent for recrystallisation? sparingly soluble in hot solvent and readily soluble in cold solvent readily soluble in both hot and cold solvent sparingly soluble in both hot and cold solvent readily soluble in hot solvent and sparingly soluble in cold solvent Question 18 1 pts How would you modify the procedure given in the Laboratory Manual if you did not know which solvent to use? if...
can
you please answer all
1. When you run a TLC of the reaction in ethyl acetate : hexanes 1:1, the plate below is produced. Give a solvent system that would be expected to produce greater separation and a BRIEF (8 words) justification about your choice. (5 points) 7 6 5 4 3 b. Calculate the R for the bottom spot. (5 points) c. Which compound on the TLC plate is the most polar? (5 points) 2. Why is it...
Identify which one of the seven unknowns is represented in the
data given and why
Lab 8: Instrumental Analysis You are given seven unknowns, all of which are white or brown powders. Use the provided IR and 1H NMR spectra to assign Unknowns 1-7 to the given compounds. Label all spectra and briefly explain how you made your determinations. NH ОН OR foncommon - 0 o-vanillin Benzoic acid p-toluidine 4-tert-butylphenol OH Y OH H2NY COH salicylic acid 9-fluorenol 4-aminobenzoic acid...
organic elin PRE-LAB QUESTIONS 1. Would you expect 4-h Explain and include a b uld you expect 4-hydroxyphenylacetic acid to be soluble or insoluble in 1.0 M NaOH? d include a balanced chemical equation with your answer. Но, 4-hydroxyphenylacetic acid 2. Although testosterone and slightly soluble in methanol at h testosterone and methanol both have a free OH group, testosterone is only coluble in methanol at room temperature. Explain why this is. OH testosterone 2 Draw a flowchart (similar to...
Leader name 4. Methanol is a highly poisonous solvent, chemically similar to ethanol (alcohol) and similar in appearance and scent. In the US, methanol poisoning is most likely to occur from Ingestion of windshield wiper fluid or other household or industrial products. Poisoning can also occur from drinking adulterated alcoholic beverages Methanol is broken down to formaldehyde by alcohol dehydrogenase (ADH), and then the formaldehyde is broken down to formic acid by aldehyde dehydrogenase (ALDH). Formic acid is highly toxic...
can
you answerthe lab questions 1-5?
1. Explain why methanol and sodium carbonate were both able to dissolve in water, but only sodium carbonate was able to conduct electricity in solution. (3 pts) 2. Look up the chemical structures of methane and methanol. Based on their structures, which of the two do you expect to be water soluble? Explain your answer. (4 pts) 3. What are the main structural differences and similarities between methanol and 1-decanol. Explain the observed difference...
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