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1. C. A student reacted anisole with acetic anhydride in dichloromethane using aluminum chloride as a...
1. A. Predict the products for the following reaction and write a rational mechanism. OCH3 (CH3CO20...
1. A. Predict the products for the following reaction and write a rational mechanism. OCH3 (CH3CO20 AICI: Mechanism: 1. B. Why are much larger quantities of aluminum chloride required for Friedel-Crafts acylation reactions than for alkylation reactions? T.C. A student reacted anisole with acetic anhydride in dichloromethane using aluminum chloride as a catalyst. The student used the experimental procedure as described in the laboratory manual. At the end of the experiment the student failed to get +- methoxyacetophenone. Give reasons...
QUESTION 1 Propanoyl chloride reacts with an acetate anion to give which product? Acetic propanoic anhydride...
QUESTION 1 Propanoyl chloride reacts with an acetate anion to give which product? Acetic propanoic anhydride propanoic acetic anhydride propyl acetate Cacetyl propanoate QUESTION 2 Reaction of benzoic acid with thionyl chloride produces compound A. Compound A is reacted with 2 moles of ammonia to give compound B which is then reacted with thionyl chloride to furnish compound C. Compounds C is then treated with NaOH in the first step and acidified with acid in the second step to give...
Preparation of Aspirin Name Class & Section PRE-LABORATORY ASSIGNMENT 1. What hazards should you be aware of wh...
Preparation of Aspirin Name Class & Section PRE-LABORATORY ASSIGNMENT 1. What hazards should you be aware of when working with the following chemicals? a. Acetic anhydride b. Concentrated sulfuric acid 2. Explain the following terms as they relate to this experiment. a. Catalyst b. Limiting reactant 3. Following the procedure described in this experiment, a student reacted 2.775 g of salicylic acid with 4.0 ml of acetic anhydride and recovered 2.986 g of aspirin. a. Calculate the number of moles...
Calculate the number of moles of acetic anhydride present in the reaction mixture. c. w d....
Calculate the number of moles of acetic anhydride present in the reaction mixture. c. w d. Based on the number of moles of each reactant and the stoichiometry of the reaction, determine the limiting reactant in the preparation. Calculate the theoretical yield of the preparation, based on the number of moles of limiting reactant present. e. Calculate the percent yield of the preparation. f. Preparation of Aspirin Page 86 6. Limiting reactant 3. Following the procedure described in this experiment,...
QUESTION 3 Salicylic acid reacts with acetic anhydride to form aspirin and acetic acid as shown. Use the equation to answer Questions 3 – 6. (salicylic acid) ...
QUESTION 3 Salicylic acid reacts with acetic anhydride to form aspirin and acetic acid as shown. Use the equation to answer Questions 3 – 6. (salicylic acid) (aspirin) C7H6O3 (s) + C4H6O3 (l) → C9H8O4 (s) + CH3COOH (l) MM = 138 MM = 180 If we divide 180 by 138 we find that 1.00 g salicylic acid will produce a maximum of 1.30 g aspirin. 3. A student starts with 3.20 g salicylic acid. What is the maximum amount...
1) Which reactant, salicylic acid or acetic anhydride, is in excess? Show your work. 2) If you we...
1) Which reactant, salicylic acid or acetic anhydride, is in
excess? Show your work.
2) If you were to use 3.17 g of starting material, how much
product would you expect? Again, show your work.
3) Why is phosphoric acid added to the reaction?
4) A small amount of water is added at the end of the reaction
to react with the excess acetic anhydride. Show a balanced equation
for that reaction.
5) Explain the purpose of the FeCl3 test...
Percentage of Oxygen in Potassium Chlorate Introduction: The thermal decomposition of potassium chlorate can be described...
Percentage of Oxygen in Potassium Chlorate Introduction: The thermal decomposition of potassium chlorate can be described by the following equation: 2 KCIO3(s) 2 KCls) + 3 O2(g) Egn 1 (D stands for heating, elevated temperature) In this experiment you will determine the percentage of oxygen in potassium chlorate. You will compare the experimental result with the theoretical percentage calculated from the formula KCIO3. While potassium chlorate decomposes simply by heating, the reaction is very slow. A catalyst is used. Catalyst...
2016 P PHYSICS 1 FREE-RESPONSE QUESTIONS 2. (12 points, suggested time 25 minutes) new kind of toy ball is advertised to "bounce perfectly elastically" off hard surfaces. A student suspec...
2016 P PHYSICS 1 FREE-RESPONSE QUESTIONS 2. (12 points, suggested time 25 minutes) new kind of toy ball is advertised to "bounce perfectly elastically" off hard surfaces. A student suspects, however, that no collision can be perfectly elastic. The student hypothesizes that the collisions are very close to being perfectly elastic for low-speed collisions but that they deviate more and more from being perfectly elastic as the collision speed increases. (a) Design an experiment to test the student's hypothesis about...
Show the structure of your target molecule as well as the Synthetic schemes illustrating the two...
Show the structure of your target molecule as well as the Synthetic
schemes illustrating the two steps required for preparing it from
“allowed” starting materials. for each synthetics that indicate the
source of the experimental procedure you will follow - sources can
either be literature references or simply the course packet self.
Proposed Synthesis Show the structure of your target molecule as well as synthetic schemes illustrating the two steps required for preparing it from "allowed" starting materials. For each...
Proposed Synthesis Show the structure of your target molecule as well as synthetic schemes illustrating the two st...
Proposed Synthesis Show the structure of your target molecule as well as synthetic schemes illustrating the two steps required for preparing it from "allowed" starting materials. For each synthetic step indicate the source of the experimental procedure you will follow-sources can either be literature references or simply the course pack itself. (See the example below for the format to be followed) ~Example Target Molecule: NO2 Cl Step 1: OH Reference: Tetrahedron, 1990, 46, 2975 HNO3 Step 2 o H2SO4 NO2...
1. A. Predict the products for the following reaction and write a rational mechanism. OCH3 (CH3CO20 AICI: Mechanism: 1. B. Why are much larger quantities of aluminum chloride required for Friedel-Crafts acylation reactions than for alkylation reactions? T.C. A student reacted anisole with acetic anhydride in dichloromethane using aluminum chloride as a catalyst. The student used the experimental procedure as described in the laboratory manual. At the end of the experiment the student failed to get +- methoxyacetophenone. Give reasons...
QUESTION 1 Propanoyl chloride reacts with an acetate anion to give which product? Acetic propanoic anhydride propanoic acetic anhydride propyl acetate Cacetyl propanoate QUESTION 2 Reaction of benzoic acid with thionyl chloride produces compound A. Compound A is reacted with 2 moles of ammonia to give compound B which is then reacted with thionyl chloride to furnish compound C. Compounds C is then treated with NaOH in the first step and acidified with acid in the second step to give...
Preparation of Aspirin Name Class & Section PRE-LABORATORY ASSIGNMENT 1. What hazards should you be aware of when working with the following chemicals? a. Acetic anhydride b. Concentrated sulfuric acid 2. Explain the following terms as they relate to this experiment. a. Catalyst b. Limiting reactant 3. Following the procedure described in this experiment, a student reacted 2.775 g of salicylic acid with 4.0 ml of acetic anhydride and recovered 2.986 g of aspirin. a. Calculate the number of moles...
Calculate the number of moles of acetic anhydride present in the reaction mixture. c. w d. Based on the number of moles of each reactant and the stoichiometry of the reaction, determine the limiting reactant in the preparation. Calculate the theoretical yield of the preparation, based on the number of moles of limiting reactant present. e. Calculate the percent yield of the preparation. f. Preparation of Aspirin Page 86 6. Limiting reactant 3. Following the procedure described in this experiment,...
1) Which reactant, salicylic acid or acetic anhydride, is in
excess? Show your work.
2) If you were to use 3.17 g of starting material, how much
product would you expect? Again, show your work.
3) Why is phosphoric acid added to the reaction?
4) A small amount of water is added at the end of the reaction
to react with the excess acetic anhydride. Show a balanced equation
for that reaction.
5) Explain the purpose of the FeCl3 test...
Percentage of Oxygen in Potassium Chlorate Introduction: The thermal decomposition of potassium chlorate can be described by the following equation: 2 KCIO3(s) 2 KCls) + 3 O2(g) Egn 1 (D stands for heating, elevated temperature) In this experiment you will determine the percentage of oxygen in potassium chlorate. You will compare the experimental result with the theoretical percentage calculated from the formula KCIO3. While potassium chlorate decomposes simply by heating, the reaction is very slow. A catalyst is used. Catalyst...
2016 P PHYSICS 1 FREE-RESPONSE QUESTIONS 2. (12 points, suggested time 25 minutes) new kind of toy ball is advertised to "bounce perfectly elastically" off hard surfaces. A student suspects, however, that no collision can be perfectly elastic. The student hypothesizes that the collisions are very close to being perfectly elastic for low-speed collisions but that they deviate more and more from being perfectly elastic as the collision speed increases. (a) Design an experiment to test the student's hypothesis about...
Show the structure of your target molecule as well as the Synthetic
schemes illustrating the two steps required for preparing it from
“allowed” starting materials. for each synthetics that indicate the
source of the experimental procedure you will follow - sources can
either be literature references or simply the course packet self.
Proposed Synthesis Show the structure of your target molecule as well as synthetic schemes illustrating the two steps required for preparing it from "allowed" starting materials. For each...
Proposed Synthesis Show the structure of your target molecule as well as synthetic schemes illustrating the two steps required for preparing it from "allowed" starting materials. For each synthetic step indicate the source of the experimental procedure you will follow-sources can either be literature references or simply the course pack itself. (See the example below for the format to be followed) ~Example Target Molecule: NO2 Cl Step 1: OH Reference: Tetrahedron, 1990, 46, 2975 HNO3 Step 2 o H2SO4 NO2...
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