In the seperation of acid from neutral substance, benzoic acid and 1,4- dimethoxybenzene were used. Show...
In the seperation of acid from neutral substance, benzoic acid and 1,4- dimethoxybenzene were used. Show and discuss each reaction that took place during experiment. There are two. Use electron flow arrows. Discuss when and why reaction took place.
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In the seperation of acid from neutral substance, benzoic acid
and 1,4- dimethoxybenzene were used. Show...
seperation of acid neutral Experiment 5: Separation of Acid-Neutral Mixture Post-Lab Questions 1. Draw and label...
seperation of acid neutral
Experiment 5: Separation of Acid-Neutral Mixture Post-Lab Questions 1. Draw and label the structures of the major and minor components of the acidic and neutral mixtures. 2. Although acetic acid - water may be used as a "solvent pair", why are dilute solutions of an inorganic acid/water (or, inorganic base/water) avoided in recrystallization attempts? (Hint: see Wade Ed: Sections 21-12, 21- 13. Consider functional-group possibilities.] 3. Using a flow diagram, show the separation of a mixture...
Experiment 12: Synthesis of Benzoic Acid pre-lab (4 pts) 1 (2 pts) Refer to the introduction...
Experiment 12: Synthesis of Benzoic Acid pre-lab (4 pts) 1 (2 pts) Refer to the introduction on the general process of hydrolysis of nitriles to carboxylic acids. Starting with benzonitrile (shown below), show how it is converted to benzoic acid under basic conditions. N 2) (2 pts) The reaction for the synthesis of benzoic acid via benzonitrile hydrolysis is shown below: 1) NaOH, HO YOH + NaCl 2) HCI, H,0 Benzonitrile Density = 1.0 g/mL MM = 103.04 g/mol Benzoic...
1. Two compounds, benzoic acid and salicylic acid were both isolated and saved unlabeled in your...
1. Two compounds, benzoic acid and salicylic acid were both isolated and saved unlabeled in your lab drawer. Explain why differentiating between the two compounds would be difficult even after obtaining an IR spectrum of each. Explain the slight difference(s) which might be seen. Feel free to draw arrows and/or absorbances on the IR of benzoic acid (below) for your explanation: TRANSMETTANCEINE MIN RAVENURSERI-
QUESTIONS 1. What is the purpose of the sulfuric acid (yes, it's a catalyst, but why...
QUESTIONS 1. What is the purpose of the sulfuric acid (yes, it's a catalyst, but why is it a catalyst? What is it doing that makes the reaction possible? Would the reaction just go slower without it, or would the reaction not go at all? Why?) 2. If isobutyl alcohol (2 methyl propanol) is used instead of tert butyl alcohol, a mixture of products is obtained. One the products is the same as the product obtained with the tert butyl...
Extraction Q1. Why doesn’t the neutral organic compound dissolve in the 1.5 M NaOH solution? Q2....
Extraction Q1. Why doesn’t the neutral organic compound dissolve in the 1.5 M NaOH solution? Q2. Why is diethyl ether a good choice for the organic solvent in this extraction experiment? Q3. What experimental difficulty would you encounter if you neglected to include the drying step before evaporating the ether solution of the neutral organic compound? Q4. Why are the two organic compounds recrystallized before their melting points are determined? Q5. What IR bands are most useful in distinguishing a...
I was conducting an acid-base extraction experiment with the objective of identifying an unknown benzoic acid...
I was conducting an acid-base extraction experiment with the objective of identifying an unknown benzoic acid from a mixture. My group recrystallized the aqueous layer and obtained its melting point to compare with standard compounds. In the end, our melting range for the recrystallized product was 136.0ºC - 142.2ºC which was only similar to the range of the standard 2-chloromethyl benzoic acid (139.4ºC - 143.6ºC) out of all the provided standards. However, when testing the mixed melting point of the...
Complete the electron-pushing mechanism for the E1 reaction when 2-methylbutan-2-ol is treated with 20% sulfuric acid....
Complete the electron-pushing mechanism for the E1 reaction when
2-methylbutan-2-ol is treated with 20% sulfuric acid.
Hint: The E1 mechanism involves dissociation of the hydroxyl
group from the substrate. The acid is used to convert the hydroxyl
group to a good leaving group. Do not delete any pre-drawn
bonds/charges/lone pairs.
Complete the electron-pushing mechanism for the E1 reaction when 2-methylbutan-2-ol is treated with 20% sulfuric acid Map a) Use two curved arrows to show the fast b) Use a curved...
The enthalpy of combustion of benzoic acid (C6H5COOH) is commonly used as the standard for calibrating...
The enthalpy of combustion of benzoic acid (C6H5COOH) is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be – 3226.7 kJ/mol. (a) When 0.4654 g of a-D-glucose (C6H12O6) was oxidized the temperature rose from 21.22 °C to 22.28 °C. Calculate the enthalpy of combustion of glucose and the value of DUrxn for the combustion. (Hint: Be sure to write a balanced equation for each reaction first and assume the product H2O...
1. Write balanced chemical equations for the formation of a substance that you prepared in this...
1. Write balanced chemical equations for the formation of a substance that you prepared in this experiment 2. Outline a series of chemical equations to show how your product could have been pre- pared using a Grignard reaction. Be sure to show the structures of all starting materials and intermediates. 3. Draw the structure of the product that would have been formed if benzaldehyde had been used in place of 3-pentanone in this experiment. 4. When benzaldehyde is used as...
22. Write an equation that accounts for the solubility of benzoic acid in aqueous base. 23....
22. Write an equation that accounts for the solubility of benzoic acid in aqueous base. 23. What would you expect to happen if a solution of sodium benzoate were acidified? Write an equation. 24. What would have been the effect of omitting the sulfuric acid from methyl benzoate preparation by reacting benzoic acid with methanol? 25. Criticize the following techniques: (a) Heating a mixture that contains n-hexane using an open flame. (b) For a reaction, heating a mixture that contains...
seperation of acid neutral
Experiment 5: Separation of Acid-Neutral Mixture Post-Lab Questions 1. Draw and label the structures of the major and minor components of the acidic and neutral mixtures. 2. Although acetic acid - water may be used as a "solvent pair", why are dilute solutions of an inorganic acid/water (or, inorganic base/water) avoided in recrystallization attempts? (Hint: see Wade Ed: Sections 21-12, 21- 13. Consider functional-group possibilities.] 3. Using a flow diagram, show the separation of a mixture...
Experiment 12: Synthesis of Benzoic Acid pre-lab (4 pts) 1 (2 pts) Refer to the introduction on the general process of hydrolysis of nitriles to carboxylic acids. Starting with benzonitrile (shown below), show how it is converted to benzoic acid under basic conditions. N 2) (2 pts) The reaction for the synthesis of benzoic acid via benzonitrile hydrolysis is shown below: 1) NaOH, HO YOH + NaCl 2) HCI, H,0 Benzonitrile Density = 1.0 g/mL MM = 103.04 g/mol Benzoic...
1. Two compounds, benzoic acid and salicylic acid were both isolated and saved unlabeled in your lab drawer. Explain why differentiating between the two compounds would be difficult even after obtaining an IR spectrum of each. Explain the slight difference(s) which might be seen. Feel free to draw arrows and/or absorbances on the IR of benzoic acid (below) for your explanation: TRANSMETTANCEINE MIN RAVENURSERI-
QUESTIONS 1. What is the purpose of the sulfuric acid (yes, it's a catalyst, but why is it a catalyst? What is it doing that makes the reaction possible? Would the reaction just go slower without it, or would the reaction not go at all? Why?) 2. If isobutyl alcohol (2 methyl propanol) is used instead of tert butyl alcohol, a mixture of products is obtained. One the products is the same as the product obtained with the tert butyl...
Complete the electron-pushing mechanism for the E1 reaction when
2-methylbutan-2-ol is treated with 20% sulfuric acid.
Hint: The E1 mechanism involves dissociation of the hydroxyl
group from the substrate. The acid is used to convert the hydroxyl
group to a good leaving group. Do not delete any pre-drawn
bonds/charges/lone pairs.
Complete the electron-pushing mechanism for the E1 reaction when 2-methylbutan-2-ol is treated with 20% sulfuric acid Map a) Use two curved arrows to show the fast b) Use a curved...
1. Write balanced chemical equations for the formation of a substance that you prepared in this experiment 2. Outline a series of chemical equations to show how your product could have been pre- pared using a Grignard reaction. Be sure to show the structures of all starting materials and intermediates. 3. Draw the structure of the product that would have been formed if benzaldehyde had been used in place of 3-pentanone in this experiment. 4. When benzaldehyde is used as...
22. Write an equation that accounts for the solubility of benzoic acid in aqueous base. 23. What would you expect to happen if a solution of sodium benzoate were acidified? Write an equation. 24. What would have been the effect of omitting the sulfuric acid from methyl benzoate preparation by reacting benzoic acid with methanol? 25. Criticize the following techniques: (a) Heating a mixture that contains n-hexane using an open flame. (b) For a reaction, heating a mixture that contains...
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