(1) For crystallization in lab, What is the best solvent to use for: Methyl 4-aminobenzoate and...
(1) For crystallization in lab, What is the best solvent to use for:
Methyl 4-aminobenzoate
and
Phenanthrene
(2) Also, why are the chosen solvents the best for their crystallization?
My lab only has methanol, water, toluene, hexane, methylene chloride, or ethanol. could you choose the best from these?
Homework Answers
Add Answer to:
(1) For crystallization in lab, What is the best solvent to use
for:
Methyl 4-aminobenzoate
and...
I have a mixture of three compounds and I want to separate them. The compounds are...
I have a mixture of three compounds and I want to separate them. The compounds are ethyl aminobenzoate (50%), benzoin (40%), and 1,4-dibromobenzene(10%). I started the experiment by dissolving the mixture in the methylene chloride, then I added HCl, so I got two layers, first one is aqueous layer that contain ethyl aminobenzoate, and the second one is organic layer that contain benzoin and 1,4-dibromobenzene. After that I add NaOH to aqueous layer and I got a solid, then I...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic solvents? 2. Of the following, which are flammable? Circle all that apply. Acetone Water Ethanol 3. An organic compound (literature mp=255 - 256°C) has the following solubilities: solvent soluble cold soluble hot acetone yes yes water no no ethanol no yes petroleum ether no no Which is the best solvent to recrystallize the organic compound? Why? Why are the other solvents not suitable? Explain...
Question 39 3.3 What is the best choice of reagent(s) to perform the following transformation? H2O,...
Question 39 3.3 What is the best choice of reagent(s) to perform the following transformation? H2O, H2504 Hg(OAc)2 and H20;followed by NaBH4 BH3; followed by H2O2. NaOH OsO4: followed by NaHSO3 Question 40 3.3 Which of the following sets consists of only aprotic solvents? water, hexane, methanol acetic acid, DMF, toluene DMSO, ethanol, acetonitrile hexane, acetonitrile, DMSO
You have a separatory funnel that contains a solution of 4-methyl benzoic acid and ethoxybenzene in...
You have a separatory funnel that contains a solution of 4-methyl benzoic acid and ethoxybenzene in methylene chloride. By adding KOH (aq) into this solution for extraction, what compound(s) would be expected to form in the aqueous layer? Write the equation. Compound X has a hexane/water distribution coefficient of 2.0. (a) Does compound X have a higher or lower solubility in hexane comparing to water? (b) How much of a 3.0 g sample of compound X dissolved in 100 ml...
1. Compound X has a solubility in toluene of 18 mg per 100 mL at 20...
1. Compound X has a solubility in toluene of 18 mg per 100 mL at 20 °C, and a solubility of 0.64 g per 100 mL at 70 °C. You are given a sample of 0.48 g of compound X which is contaminated with 25 mg of compound Y. A. If compound Y is always soluble in toluene, describe in detail how you could separate Y from X. Would x now be pure? B. If compound Y has approximately the same values of...
Hi! Can you please answer questions a and b for my organic lab report :) The...
Hi! Can you please answer questions a and b for my organic lab
report :) The pictures below the questions is my lab procedure.
Thank you
6. Analysis Questions: a) This lab utilized a new technique called reflux, and the use of a condenser tube while heating the reaction. What is the purpose of the condenser? Why not just heat the reaction in a closed vessel instead? b) A student misread the instructions and first refluxed the sodium methoxide in...
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...
I need help with questions 1-4. I appreciate all the help. Thanks! POST LAB ANALYSIs I....
I need help with questions 1-4. I appreciate all the help.
Thanks!
POST LAB ANALYSIs I. Why do solutions with dissolved salts boil at a higher temperature than the pure solvent? Why do solutions of two miscible liquids boil at a temperature that is in between the boiling point of the components? 2. Why do mixtures of immiscible liquids boil at temperatures lower than the boiling points of the components? 3. 4. For each of the following mixtures, predict the...
What can cause a low percent yield? In lab we did fischer esterification using benzoic acid...
What can cause a low percent yield? In lab we did fischer esterification using benzoic acid and methanol to yield methyl benzoate. 3.05 grams of benzoic acid were used and 1.10 grams of methyl benzoate were produced. We also washed the product multiple times with water, 10% sodium bicarbonate solution, then saturated sodium chloride solution. Could the washing cause a low percent yield? If so, can you explain why?
please answer all parts Does 1-chlorobutane, an alkyl chloride, undergo a substitution reaction with the nucleophiles...
please answer all parts
Does 1-chlorobutane, an alkyl chloride, undergo a substitution reaction with the nucleophiles NaCl, NaBr, or Nal? Solubility data for each of these nucleophiles and the substrate is given in Table 1 below. Table 1: Solubility of Compounds in Various Solvents Compound Solvents in Which Soluble 1-chlorobutane Diethyl ether, hexanes, acetone, tetrahydrofuran NaCl Water, glycerol, ethylene glycol, formic acid NaBr Water, methanol Nal Water, ethanol, acetone 4. Write balanced chemical equations showing 1-chlorobutane undergoing a nucleophilic substitution...
Pre-lab questions for Experiment #1: Crystallization 1. Why should open flames NOT be used around organic solvents? 2. Of the following, which are flammable? Circle all that apply. Acetone Water Ethanol 3. An organic compound (literature mp=255 - 256°C) has the following solubilities: solvent soluble cold soluble hot acetone yes yes water no no ethanol no yes petroleum ether no no Which is the best solvent to recrystallize the organic compound? Why? Why are the other solvents not suitable? Explain...
Question 39 3.3 What is the best choice of reagent(s) to perform the following transformation? H2O, H2504 Hg(OAc)2 and H20;followed by NaBH4 BH3; followed by H2O2. NaOH OsO4: followed by NaHSO3 Question 40 3.3 Which of the following sets consists of only aprotic solvents? water, hexane, methanol acetic acid, DMF, toluene DMSO, ethanol, acetonitrile hexane, acetonitrile, DMSO
You have a separatory funnel that contains a solution of 4-methyl benzoic acid and ethoxybenzene in methylene chloride. By adding KOH (aq) into this solution for extraction, what compound(s) would be expected to form in the aqueous layer? Write the equation. Compound X has a hexane/water distribution coefficient of 2.0. (a) Does compound X have a higher or lower solubility in hexane comparing to water? (b) How much of a 3.0 g sample of compound X dissolved in 100 ml...
Hi! Can you please answer questions a and b for my organic lab
report :) The pictures below the questions is my lab procedure.
Thank you
6. Analysis Questions: a) This lab utilized a new technique called reflux, and the use of a condenser tube while heating the reaction. What is the purpose of the condenser? Why not just heat the reaction in a closed vessel instead? b) A student misread the instructions and first refluxed the sodium methoxide in...
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...
I need help with questions 1-4. I appreciate all the help.
Thanks!
POST LAB ANALYSIs I. Why do solutions with dissolved salts boil at a higher temperature than the pure solvent? Why do solutions of two miscible liquids boil at a temperature that is in between the boiling point of the components? 2. Why do mixtures of immiscible liquids boil at temperatures lower than the boiling points of the components? 3. 4. For each of the following mixtures, predict the...
please answer all parts
Does 1-chlorobutane, an alkyl chloride, undergo a substitution reaction with the nucleophiles NaCl, NaBr, or Nal? Solubility data for each of these nucleophiles and the substrate is given in Table 1 below. Table 1: Solubility of Compounds in Various Solvents Compound Solvents in Which Soluble 1-chlorobutane Diethyl ether, hexanes, acetone, tetrahydrofuran NaCl Water, glycerol, ethylene glycol, formic acid NaBr Water, methanol Nal Water, ethanol, acetone 4. Write balanced chemical equations showing 1-chlorobutane undergoing a nucleophilic substitution...
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