1. To extract aniline from a solution of chloroform, one would use: a. aqueous HCl b....
1. To extract aniline from a solution of chloroform, one would use:
a. aqueous HCl
b. aqueous NaOH
c. aqueous NaHCO3
d. either B or C would work
2. To extract benzyl alcohol from a solution of chloroform, one would use
a. aqueous HCl
b. aqueous NaOH
c. aqueous NH3
d. either B or C would work
Homework Answers
1) aniline is a base and hence to extract it from the organic phase i.e. CHCl3 we can use an aqueous HCl solution.
The reaction: Ph-NH2(organic phase) + HCl(aq) ------> PhNH3+Cl-(aq)
Answer is option a) aqueous HCl
2) Benzyl alcohol is an alcohol and hence it neutral in nature. We can not use any base of acid to extract it. Hence answer should be none of these. However, this option is not present in the given series of options.
HCl or NaOH does not react with alcohol to form any salt, Similarly, NH3 also does not react hence answer should none of these.
For this extraction, after removing all other components chloroform is evaporated to obtain benzyl alcohol (PhCH2OH)
Add Answer to:
1. To extract aniline from a solution of chloroform, one would
use:
a. aqueous HCl
b....
Part B - Questions 1) Put the letter of the correct answer for each of the...
Part B - Questions 1) Put the letter of the correct answer for each of the following questions in the box to the right. 10 points a. For a mixture of pure hexane and pure dimethylformamide, the dimethylformamide layer will be found as: (A) the top layer (B) the bottom layer (C) neither; the two (D) cannot determine solvents are miscible b. To extract aniline (C&H5NH2) from a solution of chloroform, one would use: (A) aqueous HCI (B) aqueous NaOH...
Part B Questions 1) Put the letter of the correct answer for each of the following questions in the box to the right 10...
Part B Questions 1) Put the letter of the correct answer for each of the following questions in the box to the right 10 points a. For a mixture of pure hexane and pure dimethylformamide, the dimethylformamide layer will be found as: (A) the top layer (B) the bottom layer (C) neither; the two (D) cannot determine solvents are miscible b. To extract aniline (CeH5NH2) from a solution of chloroform, one would use: (D) either B or C would work...
13. A solution of naphthalene, aniline, and benzoic acid in CH;Cl2 is treated with aqueous NaOH....
13. A solution of naphthalene, aniline, and benzoic acid in CH;Cl2 is treated with aqueous NaOH. What compound is extracted into the aqueous layer? NH2 он naphthalene benzoic acid aniline a. naphthalene b. aniline, as its sodium salt c. benzoic acid, as its sodium salt d. aniline and naphthalene 14. Which of the following Sy1 reactions did the Spartan program predict to have the lowest energy (AHrn, kcal/mol)? a. CH;CH;CH;CH;CI → CH;CHCH;CH, + Cr b. CH;CH;CHCICH3 CH;CH2CHCH, + Cr to...
Options for each question: 6 M HCL, 5% HCL solution, Dichloromethane, 6 M NaOH, 5% NaOH...
Options for each question: 6 M
HCL, 5% HCL solution, Dichloromethane, 6 M NaOH, 5% NaOH
solution
Question 8 Status: Not yet answered Points possible: 1.00 When separating benzoic acid, naphthalene, and aniline, identify the solution used for each described purpose. Reconstitute benzoic acid from aqueous layer Choose... Extract benzoic acid into the aqueous layer Choose... Reconstitute aniline from aqueous layer Choose.. Extract aniline into the aqueous layer Choose... Extract reconstituted benzoic acid out of the aqueous layer Choose... Extract...
**ochem help please Final Exam Questions, Experiment 5 A multistep synthesis of aniline from toluene is...
**ochem help please
Final Exam Questions, Experiment 5 A multistep synthesis of aniline from toluene is shown below, with reagents missing. Use it to answer the following questions. 1) Which reagents would you use to perform reaction A? a) KMnO b) N-bromosuccinimide, UV light. c) NaOH. d) OsO.. 2) Which reagents would you use to perform reaction B? a) PBr. b) p-toluenesulfonyl chloride. c) SOCI2. d) NaOCl, NaOH. 3) Which reagents would you use to perform reaction D? a) NaN3,...
Which one of the following aqueous solutions has the lowest [OH]? A. pure water B. 1...
Which one of the following aqueous solutions has the lowest [OH]? A. pure water B. 1 × 10-4 M solution of NaOH C. a solution with a pOH of 2.0 D. a solution with a pH of 8.0 E. 1 × 10-3 M solution of NH3
An aqueous solution of HCl is added to an aqueous solution of NaOH in a coffee...
An aqueous solution of HCl is added to an aqueous solution of NaOH in a coffee cup calorimeter. The reaction is that of neutralization between the acid and the base: HCI + NaOH H2O + Naci To calculate the approximate enthalpy change for this reaction using q-m•C•AT. what value should the student give to C in the equation ? O The student must use the heat of formation of water. The student must use the heat of formation of Naci....
5. Compound C is insoluble in water and is soluble in 5M HCl solution. Identify the...
5. Compound C is insoluble in water and is soluble in 5M HCl solution. Identify the structure of C from the following options. i) Aniline ii) Benzoic acid iii) Phenol iv) Toluene 6. Compound D is insoluble in water/ 5M HCI / 5M NaOH / 5MNaHCO3 solutions. It forms a silver mirror when treated with Ammonical silver nitrate solution (Tollen's reagent). Identify the functional group in D. i) An alkyne ii) Phenol iii) An alkene iv) An aldehyde 7. Compound...
Circle one best answer for each multiple. (4 pt. each) 1. The pH of 2.OM HCl...
Circle one best answer for each multiple. (4 pt. each) 1. The pH of 2.OM HCl is a) 2.0, b) 1.0, c) 0.0, d) <0.0. 2. Thymol blue appears red below pH 1.0, yellow between PH 2.5 - 8.0, and blue above pH 9.5. An aqueous solution turns green upon adding one drop of thymol blue. The pH of this solution is a) 0.5, b) 7, c) 9, d) 11. 3. The buffer HF/F can be prepared by mixing a)...
26. The solubility of CaF? would acidic. A a, increase b. decrease fone made the solution...
26. The solubility of CaF? would acidic. A a, increase b. decrease fone made the solution more one made the C/ stay the same if one added NaCN to the 27. The solubility of Cu(OH)2 would solution. a increase b. decrease c. stay the same 28. CN, NH3, and some other compounds and ions will bind to transition metal ions and make them more soluble. The cyanide is acting like a a. Bronsted acid b. Bronsted base c. Lewis acid...
Part B - Questions 1) Put the letter of the correct answer for each of the following questions in the box to the right. 10 points a. For a mixture of pure hexane and pure dimethylformamide, the dimethylformamide layer will be found as: (A) the top layer (B) the bottom layer (C) neither; the two (D) cannot determine solvents are miscible b. To extract aniline (C&H5NH2) from a solution of chloroform, one would use: (A) aqueous HCI (B) aqueous NaOH...
Part B Questions 1) Put the letter of the correct answer for each of the following questions in the box to the right 10 points a. For a mixture of pure hexane and pure dimethylformamide, the dimethylformamide layer will be found as: (A) the top layer (B) the bottom layer (C) neither; the two (D) cannot determine solvents are miscible b. To extract aniline (CeH5NH2) from a solution of chloroform, one would use: (D) either B or C would work...
13. A solution of naphthalene, aniline, and benzoic acid in CH;Cl2 is treated with aqueous NaOH. What compound is extracted into the aqueous layer? NH2 он naphthalene benzoic acid aniline a. naphthalene b. aniline, as its sodium salt c. benzoic acid, as its sodium salt d. aniline and naphthalene 14. Which of the following Sy1 reactions did the Spartan program predict to have the lowest energy (AHrn, kcal/mol)? a. CH;CH;CH;CH;CI → CH;CHCH;CH, + Cr b. CH;CH;CHCICH3 CH;CH2CHCH, + Cr to...
Options for each question: 6 M
HCL, 5% HCL solution, Dichloromethane, 6 M NaOH, 5% NaOH
solution
Question 8 Status: Not yet answered Points possible: 1.00 When separating benzoic acid, naphthalene, and aniline, identify the solution used for each described purpose. Reconstitute benzoic acid from aqueous layer Choose... Extract benzoic acid into the aqueous layer Choose... Reconstitute aniline from aqueous layer Choose.. Extract aniline into the aqueous layer Choose... Extract reconstituted benzoic acid out of the aqueous layer Choose... Extract...
**ochem help please
Final Exam Questions, Experiment 5 A multistep synthesis of aniline from toluene is shown below, with reagents missing. Use it to answer the following questions. 1) Which reagents would you use to perform reaction A? a) KMnO b) N-bromosuccinimide, UV light. c) NaOH. d) OsO.. 2) Which reagents would you use to perform reaction B? a) PBr. b) p-toluenesulfonyl chloride. c) SOCI2. d) NaOCl, NaOH. 3) Which reagents would you use to perform reaction D? a) NaN3,...
An aqueous solution of HCl is added to an aqueous solution of NaOH in a coffee cup calorimeter. The reaction is that of neutralization between the acid and the base: HCI + NaOH H2O + Naci To calculate the approximate enthalpy change for this reaction using q-m•C•AT. what value should the student give to C in the equation ? O The student must use the heat of formation of water. The student must use the heat of formation of Naci....
5. Compound C is insoluble in water and is soluble in 5M HCl solution. Identify the structure of C from the following options. i) Aniline ii) Benzoic acid iii) Phenol iv) Toluene 6. Compound D is insoluble in water/ 5M HCI / 5M NaOH / 5MNaHCO3 solutions. It forms a silver mirror when treated with Ammonical silver nitrate solution (Tollen's reagent). Identify the functional group in D. i) An alkyne ii) Phenol iii) An alkene iv) An aldehyde 7. Compound...
Circle one best answer for each multiple. (4 pt. each) 1. The pH of 2.OM HCl is a) 2.0, b) 1.0, c) 0.0, d) <0.0. 2. Thymol blue appears red below pH 1.0, yellow between PH 2.5 - 8.0, and blue above pH 9.5. An aqueous solution turns green upon adding one drop of thymol blue. The pH of this solution is a) 0.5, b) 7, c) 9, d) 11. 3. The buffer HF/F can be prepared by mixing a)...
26. The solubility of CaF? would acidic. A a, increase b. decrease fone made the solution more one made the C/ stay the same if one added NaCN to the 27. The solubility of Cu(OH)2 would solution. a increase b. decrease c. stay the same 28. CN, NH3, and some other compounds and ions will bind to transition metal ions and make them more soluble. The cyanide is acting like a a. Bronsted acid b. Bronsted base c. Lewis acid...
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