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2. (3 Points) of the following 3 azo dyes, one is yellow, one...
This is a Synthesis of Azo Dyes lab EXPERIMENT 8: SUPPLEMENTARY LAB QUESTIONS 1. Would you...
This is a Synthesis of Azo Dyes lab
EXPERIMENT 8: SUPPLEMENTARY LAB QUESTIONS 1. Would you expect benzoic acid or anisole to be a more effective coupling reagent? Why? Anisole would be more effective coupling agent reagents than benzoic acid because anisole has o-cH₃ an electron donating group whereas benzoic acid have a 2-oh group attached to the benzene ring that acts as electron withdrawing group. 2. Most diazo coupling reactions do not work well in acidic solutions. Explain. 3....
please answer all 1. Which fabric(s) gave the most intense colors with each of the dyes...
please answer all
1. Which fabric(s) gave the most intense colors with each of the dyes synthesized in this lab? a) b) What are key structural differences between the chemical structures of the fibers which gave intense color and the fibers that showed much less color intensity? (See Discussion Section of On-line Lab Manual for structures of the fabrics or Figure 1 in the lab manual) 2. Give the starting amine and the phenolic compound that would be used in...
I used bromocresol purple 4. Dye chemistry, following up on Question 2. a) Select one of the two dyes that was prese...
I used bromocresol purple
4. Dye chemistry, following up on Question 2. a) Select one of the two dyes that was present in your unknown dye solution. Draw the predominant chemical structure that exists under the pH conditions of the TLC elution solvent. Under the structure, indicate its color. b) Using the structure from part (a), write a balanced chemical equation to represent the reaction that occurred when the TLC plate was immersed in 1 M HCl. Under each dye...
I just need help understanding question 4 and how structure affects homo-lumo gap. Dye - 1B...
I just need help understanding question 4 and how
structure affects homo-lumo gap.
Dye - 1B 16 TT A T 28 2C Color Yollow Yellow ced Rod 476.35 Rod | 473.9 Rod | 461.77 Yollow 39.5 Amar (nm) 407.55 | 395.45 b. (0.5 points) How different are the colors of dyes 1A and 1B? (circle one) The same slightly different very different C. (0.5 points) How different are the colors of dyes 1A and 2A? (circle one) The same slightly...
can someone please answer number one? im so lost DYES AND DYEING CHAPTER 1. Calculate the...
can someone please answer number one? im so lost
DYES AND DYEING CHAPTER 1. Calculate the amounts of salicylic acid, 1-naphthol, 2-naphthol, 8-anilino-1-naph- thalenesulfonic acid ammonium salt, or N,N-dimethylaniline needed for Part 1B of this experiment (use molecules as assigned by your TA). 190mg 3-aminobenzene 2.5mL Sulfonic acid 2.5% sodium carbonate solution 81mg Sodium nitrate 2. What is the purpose of the sodium carbonate in Part 1A? Why do we add glacial acetic acid in Part 13 when we react...
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"...
Convert playlist Diction QUESTIONS 1. (2 Points) Why is it essential to keep the diazonium salt...
Convert playlist Diction QUESTIONS 1. (2 Points) Why is it essential to keep the diazonium salt at zero degrees while you are preparing the sodium 2-naphthoxide solution? 2. (2 Points) Would you need to use sodium carbonate for the diazotization of meta- nitroaniline? Explain your answer. 3. (2 Points) What would be the IUPAC name for the azo dye if you would have used p-chloroaniline instead of sulfanilic acid? Experiment 12 4. (4 Points) Calculate the theoretical yield for Orange...
I know that one of the pencil leads turned yellow/green and one was the purple pink...
I know that one of the pencil leads turned yellow/green and
one was the purple pink color but I'm not sure which goes where...
please help
Data table for observations bromothymol blue Initial indicator color of electrolysis solution Changes occurring at the positive electrode Changes occurring at the negative electrode Final indicator color of the mixed electrolysis solution Write the balanced chemical equation for the decomposition of water to its elements. Suggest an explanation for the initial indicator color of...
2. Below the color scale you dow n , which is e the dye measured at...
2. Below the color scale you dow n , which is e the dye measured at different so m Apply ad the whole different between th dyes COVERI A NAD NADH Laboratory Report 10 OM DORD 1. Draw the boundaries for the various ta below: bus ranges of colors of visible light on the wa le light on the wavelelige 750 nm 400 nm 700 nm 500 nm 600 nm 2. Below is an absorbance spectrum for a violet/purple the...
page that includes everything in green text Question 3 (32 pts.) For each of the following...
page that includes everything in green text Question 3 (32 pts.) For each of the following reactions: a) Provide the missing major organic product or reagents/conditions b) Pay attention to stereochemistry and identify any racemic mixtures using the (+) symbol. NH2 CO/HCI a) AICI: 1. KMnO/OH/boil b) 2. H30* NO2 1. H_/Pd/C c) 2. Bry/FeBrg :0: SOG/H2SO4 Question 4 (21 pts.) Assuming the A-systems in the following structures are flat, indicate whether they are aromatic, anti-aromatic or non-aromatic. H
This is a Synthesis of Azo Dyes lab
EXPERIMENT 8: SUPPLEMENTARY LAB QUESTIONS 1. Would you expect benzoic acid or anisole to be a more effective coupling reagent? Why? Anisole would be more effective coupling agent reagents than benzoic acid because anisole has o-cH₃ an electron donating group whereas benzoic acid have a 2-oh group attached to the benzene ring that acts as electron withdrawing group. 2. Most diazo coupling reactions do not work well in acidic solutions. Explain. 3....
please answer all
1. Which fabric(s) gave the most intense colors with each of the dyes synthesized in this lab? a) b) What are key structural differences between the chemical structures of the fibers which gave intense color and the fibers that showed much less color intensity? (See Discussion Section of On-line Lab Manual for structures of the fabrics or Figure 1 in the lab manual) 2. Give the starting amine and the phenolic compound that would be used in...
I used bromocresol purple
4. Dye chemistry, following up on Question 2. a) Select one of the two dyes that was present in your unknown dye solution. Draw the predominant chemical structure that exists under the pH conditions of the TLC elution solvent. Under the structure, indicate its color. b) Using the structure from part (a), write a balanced chemical equation to represent the reaction that occurred when the TLC plate was immersed in 1 M HCl. Under each dye...
I just need help understanding question 4 and how
structure affects homo-lumo gap.
Dye - 1B 16 TT A T 28 2C Color Yollow Yellow ced Rod 476.35 Rod | 473.9 Rod | 461.77 Yollow 39.5 Amar (nm) 407.55 | 395.45 b. (0.5 points) How different are the colors of dyes 1A and 1B? (circle one) The same slightly different very different C. (0.5 points) How different are the colors of dyes 1A and 2A? (circle one) The same slightly...
can someone please answer number one? im so lost
DYES AND DYEING CHAPTER 1. Calculate the amounts of salicylic acid, 1-naphthol, 2-naphthol, 8-anilino-1-naph- thalenesulfonic acid ammonium salt, or N,N-dimethylaniline needed for Part 1B of this experiment (use molecules as assigned by your TA). 190mg 3-aminobenzene 2.5mL Sulfonic acid 2.5% sodium carbonate solution 81mg Sodium nitrate 2. What is the purpose of the sodium carbonate in Part 1A? Why do we add glacial acetic acid in Part 13 when we react...
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"...
Convert playlist Diction QUESTIONS 1. (2 Points) Why is it essential to keep the diazonium salt at zero degrees while you are preparing the sodium 2-naphthoxide solution? 2. (2 Points) Would you need to use sodium carbonate for the diazotization of meta- nitroaniline? Explain your answer. 3. (2 Points) What would be the IUPAC name for the azo dye if you would have used p-chloroaniline instead of sulfanilic acid? Experiment 12 4. (4 Points) Calculate the theoretical yield for Orange...
I know that one of the pencil leads turned yellow/green and
one was the purple pink color but I'm not sure which goes where...
please help
Data table for observations bromothymol blue Initial indicator color of electrolysis solution Changes occurring at the positive electrode Changes occurring at the negative electrode Final indicator color of the mixed electrolysis solution Write the balanced chemical equation for the decomposition of water to its elements. Suggest an explanation for the initial indicator color of...
2. Below the color scale you dow n , which is e the dye measured at different so m Apply ad the whole different between th dyes COVERI A NAD NADH Laboratory Report 10 OM DORD 1. Draw the boundaries for the various ta below: bus ranges of colors of visible light on the wa le light on the wavelelige 750 nm 400 nm 700 nm 500 nm 600 nm 2. Below is an absorbance spectrum for a violet/purple the...
page that includes everything in green text Question 3 (32 pts.) For each of the following reactions: a) Provide the missing major organic product or reagents/conditions b) Pay attention to stereochemistry and identify any racemic mixtures using the (+) symbol. NH2 CO/HCI a) AICI: 1. KMnO/OH/boil b) 2. H30* NO2 1. H_/Pd/C c) 2. Bry/FeBrg :0: SOG/H2SO4 Question 4 (21 pts.) Assuming the A-systems in the following structures are flat, indicate whether they are aromatic, anti-aromatic or non-aromatic. H
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