During recrystalization, why should a minimum amount of hot solvent be used for dissolving a crude...
During recrystalization, why should a minimum amount of hot solvent be used for dissolving a crude acetanilide solid? Why must the recrystallized solid be washed with cold solvent?
Homework Answers
The minimum of hot solvent should be used for dissolving the acetanilide solid , because if more solvent is used , no crystals will be formed on cooling , even after the flask is scratched.
The recrystallized solid should be washed with cold solvent , so that any impurity sticking to it gets eliminated. The cold solvent is used so that the solid does not gets washed away.
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During recrystalization, why should a minimum amount of hot
solvent be used for dissolving a crude...
a) Why do you use a minimum of hot water solvent in carrying out a recrystallization...
a) Why do you use a minimum of hot water solvent in carrying out a recrystallization of a particular compound? b) Why is it desirable to use suction filtration rather than gravimetric filtration in recovering the purified crystals? c) Why should the suction be released before the solid is washed with fresh solvent?
why is it essential to wash the recrystallized material with cold, not warm or hot, solvent?...
why is it essential to wash the recrystallized material with cold, not warm or hot, solvent? What might occur if the wash with cold solvent was omitted?
Why should you use a minimum amount of a very cold solvent when washing the crystals...
Why should you use a minimum amount of a very cold solvent when washing the crystals of the acetaminophen? Explain. Why should you use a minimum amount of a boiling solvent when recrystallizing the crystals of the acetaminophen? Explain.
12) Water was found to be a suitable solvent for recrystallization of benzoic acid. How should...
12) Water was found to be a suitable solvent for recrystallization of benzoic acid. How should the solution of benzoic acid be prepared during the recrystallization? a. by dissolving the solid in a maximum volume of the boiling solvent b. by dissolving the solid in a minimum volume of the boiling solvent C. by adding 10 ml of hot solvent, in small portions to the solid and stirring until the solid dissolves x d. by adding 10 ml of the...
why is it important to use a minimum volume of hot solvent to dissolve an impure...
why is it important to use a minimum volume of hot solvent to dissolve an impure sample during recrystallization and why is it advisable to cool the solution of a mixture slowly during recrystallization?
After the crystals have been collected Small portions of hot solvent should be used to transfer...
After the crystals have been collected Small portions of hot solvent should be used to transfer any remaining crystals to the Buchner funnel Small portions of cold solvent should be used to transfer any remaining crystals to the Buchner funnel Small portions of room temperature solvent should be used to transfer any remaining crystals to the Buchner funnel No solvent should be used. Crystals that were not originally transferred to the Buchner funnel should be left in the Erlenmeyer flask.
please provide clear answers. Thank you! 1. (8 pts) A crude reaction product (50 mg) is...
please provide clear answers.
Thank you!
1. (8 pts) A crude reaction product (50 mg) is to be purified by recrystallization from a single solvent. a) (5 pts) The crude solubility in ethanol at boiling temperature (BT) is 50 mg/mL and at O'C is 5 mg/mL. Read the statements and fill in True or False Describe in a few words the reason. True False Describe reason for true or false Statement The crude was dissolved in 5 mL of hot...
Question #12 10) The technique of recrystallization involves dissolving a crude solute in a minimum amount...
Question #12
10) The technique of recrystallization involves dissolving a crude solute in a minimum amount of solvent to create a followed by of the solute into a more pure form. A) saturated solution; condensation B) unsaturated solution; evaporation C) supersaturated solution, recrystallization D) concentrated solution; deposition E) dilute solution; reformation 11) 11) Which of the following statements is TRUE? A) In general, the solubility of a gas in water decreases with increasing temperature. B) In general, the solubility of...
please answer all parts I am trying to check my answers. Recrystallization of Acetanilide Recrystallization is...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
Once a solvent for recrystallization is chosen, why is it important to use the minimum amount...
Once a solvent for recrystallization is chosen, why is it important to use the minimum amount possible?
Why should you use a minimum amount of a very cold solvent when washing the crystals of the acetaminophen? Explain. Why should you use a minimum amount of a boiling solvent when recrystallizing the crystals of the acetaminophen? Explain.
12) Water was found to be a suitable solvent for recrystallization of benzoic acid. How should the solution of benzoic acid be prepared during the recrystallization? a. by dissolving the solid in a maximum volume of the boiling solvent b. by dissolving the solid in a minimum volume of the boiling solvent C. by adding 10 ml of hot solvent, in small portions to the solid and stirring until the solid dissolves x d. by adding 10 ml of the...
please provide clear answers.
Thank you!
1. (8 pts) A crude reaction product (50 mg) is to be purified by recrystallization from a single solvent. a) (5 pts) The crude solubility in ethanol at boiling temperature (BT) is 50 mg/mL and at O'C is 5 mg/mL. Read the statements and fill in True or False Describe in a few words the reason. True False Describe reason for true or false Statement The crude was dissolved in 5 mL of hot...
Question #12
10) The technique of recrystallization involves dissolving a crude solute in a minimum amount of solvent to create a followed by of the solute into a more pure form. A) saturated solution; condensation B) unsaturated solution; evaporation C) supersaturated solution, recrystallization D) concentrated solution; deposition E) dilute solution; reformation 11) 11) Which of the following statements is TRUE? A) In general, the solubility of a gas in water decreases with increasing temperature. B) In general, the solubility of...
please answer all parts I am trying to check my
answers.
Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
Once a solvent for recrystallization is chosen, why is it important to use the minimum amount possible?
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