what are the properties of an ideal recrystallization solvent?
Homework Answers
2) The compound will be soluble in the boiling solvent but have a poor solubility in the same solvent after cooling.
3) Small amounts of impurities present in the crude solid will be soluble in the chosen solvent at any temperature.
Recrystallization Experiment Postlab Questions 1. Calculate the percent recovery of benzoic acid and aspirin. 2. What...
Recrystallization Experiment Postlab Questions 1. Calculate the percent recovery of benzoic acid and aspirin. 2. What are some of the properties of an ideal recrystallization solvent? 3. Why is ice cold solvent used to rinse the purified crystals? 4. If the hot solution were immediately placed in an ice water bath during the recrystallization process instead of first cooling to room temperature, how might this affect the results?
What are the advantages of using a solvent pair for recrystallization? Select all that apply. What...
What are the advantages of using a solvent pair for
recrystallization? Select all that apply.
What are the advantages of using a solvent pair for recrystallization? Select all that apply. You can quickly make the solution supersaturated by adding more of the solvent with greater dissolving power. You can calculate the precise amounts of the solvents needed for recrystallization. You can quickly make the solution supersaturated by adding more of the solvent with less dissolving power. You don't have to...
9. During the recrystallization of the benzil, an extra 7 ml of the recrystallization solvent is...
9. During the recrystallization of the benzil, an extra 7 ml of the recrystallization solvent is added after the minimum amount is found. This extra is added because the benzil crystals are light and fluffy and adsorb most of the solvent if the extra solvent is not added. Why would it be detrimental to not have any solvent left after the crystals have formed during recrystallization.
#10 What are the attributes of a good recrystallization solvent? (Two Attributes) (4 points) #10 What are the...
#10 What are the attributes of a good recrystallization solvent? (Two Attributes) (4 points)
#10 What are the attributes of a good recrystallization solvent? (Two Attributes) (4 points)
why is p ether not a good solvent for recrystallization of acetanilide
why is p ether not a good solvent for recrystallization of acetanilide
4. Based on what you know about solubility and recrystallization, which of the following solid/solvent combinations...
4. Based on what you know about solubility and recrystallization, which of the following solid/solvent combinations can be used for recrystallization? (5 pts) A. Naphthalene/ water B. Urea/hexane c. Benzoic acid/ water D. All of the above
Given a solubility data, determine the appropriate solvent to use for recrystallization. please give an example...
Given a solubility data, determine the appropriate solvent to use for recrystallization. please give an example of data and a way to determine appropriate solvent to use for recrystallization. This is needed for the purpose of understanding the concept
Recrystallization/Melting Point 2-ethoxybenzamide is the unknown. 1. Adding enough solvent to achieve a “saturated” solution is...
Recrystallization/Melting Point 2-ethoxybenzamide is the unknown. 1. Adding enough solvent to achieve a “saturated” solution is necessary for recrystallization. a. What is the problem with adding too much solvent? b. What is the problem with adding too little solvent? 2. Why is fluted filter paper preferred over standard conical filter paper for the filtration of the recrystallized solid? 3. What is the purpose of adding boiling stones when heating solutions to a boil? 4. Name 2 requirements that must be...
3. Describe the characteristics of a good recrystallization solvent. L uftetallizado
3. Describe the characteristics of a good recrystallization solvent. L uftetallizado
4. What is the point of adding a poor solvent in a mixed-solvent recrystallization? 5. Predict...
4. What is the point of adding a poor solvent in a mixed-solvent recrystallization? 5. Predict the product if you had used HBr without adding hydrogen peroxide. In your structure, specify which regioisomer would form and provide a 1-sentence explanation for your choice. [Hint: your explanation should contain the term "carbocation stability"] 6. Predict the major organic products of the following reactions. Draw the structures of all Reaction Bromine generation: 2 HBr + H2O2 Br2 + 2 H2O Bromine addition:...
Recrystallization Experiment Postlab Questions 1. Calculate the percent recovery of benzoic acid and aspirin. 2. What are some of the properties of an ideal recrystallization solvent? 3. Why is ice cold solvent used to rinse the purified crystals? 4. If the hot solution were immediately placed in an ice water bath during the recrystallization process instead of first cooling to room temperature, how might this affect the results?
What are the advantages of using a solvent pair for
recrystallization? Select all that apply.
What are the advantages of using a solvent pair for recrystallization? Select all that apply. You can quickly make the solution supersaturated by adding more of the solvent with greater dissolving power. You can calculate the precise amounts of the solvents needed for recrystallization. You can quickly make the solution supersaturated by adding more of the solvent with less dissolving power. You don't have to...
9. During the recrystallization of the benzil, an extra 7 ml of the recrystallization solvent is added after the minimum amount is found. This extra is added because the benzil crystals are light and fluffy and adsorb most of the solvent if the extra solvent is not added. Why would it be detrimental to not have any solvent left after the crystals have formed during recrystallization.
#10 What are the attributes of a good recrystallization solvent? (Two Attributes) (4 points)
#10 What are the attributes of a good recrystallization solvent? (Two Attributes) (4 points)
4. Based on what you know about solubility and recrystallization, which of the following solid/solvent combinations can be used for recrystallization? (5 pts) A. Naphthalene/ water B. Urea/hexane c. Benzoic acid/ water D. All of the above
3. Describe the characteristics of a good recrystallization solvent. L uftetallizado
4. What is the point of adding a poor solvent in a mixed-solvent recrystallization? 5. Predict the product if you had used HBr without adding hydrogen peroxide. In your structure, specify which regioisomer would form and provide a 1-sentence explanation for your choice. [Hint: your explanation should contain the term "carbocation stability"] 6. Predict the major organic products of the following reactions. Draw the structures of all Reaction Bromine generation: 2 HBr + H2O2 Br2 + 2 H2O Bromine addition:...
Most questions answered within 3 hours.
-
Problem #1
The area between Z = 0 and Z = 2.50
The area between Z...
asked 1 hour ago -
1. What is the meaning of the term communication style?
2. What are the benefits to...
asked 46 minutes ago -
9.) You are buying a car that cost $26,500. You make payments of
$412 each month...
asked 1 hour ago -
. Suppose a discrete random variable has probability
distribution
P(x) = .2 if x = 0...
asked 2 hours ago -
Under the influence of its drive force, a snowmobile is moving
at a constant velocity along...
asked 2 hours ago -
Why do organizations decline? What steps can top
management take to halt, decline, and restore organizational...
asked 2 hours ago -
What mechanisms Drive speciation??
(I.e. what was Dawins theory on the orgin of species, and how...
asked 4 hours ago -
The manager at a car assembly plant believes that the mean
assembly time for a car...
asked 5 hours ago -
Which of the following is true of electron capture?
A) It decreases the nuclide's mass number...
asked 6 hours ago -
Assuming an efficiency of 43.10%, calculate the actual yield of
magnesium nitrate formed from 114.9 g...
asked 7 hours ago -
The highly pathogenic bacterium Clostridium
perfringens causes gangrene, a disease that results in the
destruction of...
asked 9 hours ago -
In the context of situation analysis, which of the following is
a category for analysis in...
asked 9 hours ago