8. a. Explain why the melting point of pure phthalic acid is higher than that of...
8. a. Explain why the melting point of pure phthalic acid is higher than that of pure napthalene, when the two compounds have nearly the same molecular weight.
b. Explain why the melting point of pure hexane is hgiher than that of pure cyclo-hexane, when the two compounds have nearly the same molecular weight.
(Hint: reffer to structures)
Homework Answers
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8. a. Explain why the melting point of pure phthalic acid is
higher than that of...
Explain why the melting point of pure hexane is lower than that of pure cyclohexane when...
Explain why the melting point of pure hexane is lower than that of pure cyclohexane when the two compounds have nearly the same molecular weight.
- the melting point range of pure benzhydrol is ~ 15-20 °C higher than pure benzophenone....
- the melting point range of pure benzhydrol is ~ 15-20 °C higher than pure benzophenone. What structural feature on benzhydrol can account for this difference and how?
Question text You may have noticed that % composition vs Melting Point graphs are given in...
Question text You may have noticed that % composition vs Melting Point graphs are given in % Mole not % Weight. This is because melting point depression is a colligative property (review in your general chemistry text) that depends on the moles of impurity, the same number of moles of impurity of two different compounds will cause the same melting point depression! Before the advent of mass spectrometry this was one of the techniques used to determine the molecular weight...
You may have noticed that % composition vs Melting Point graphs are given in % Mole...
You may have noticed that % composition vs Melting Point graphs are given in % Mole not 96 Weight. This is because melting point depression is a colligative property (review in your general chemistry text) that depends on the moles of impurity, the same number of moles of impurity of two different compounds will cause the same melting point depression! Before the advent of mass spectrometry this was one of the techniques used to determine the molecular weight of compounds....
can you help with part b why isn't the product pure based on the melting point???...
can you help
with part b
why isn't the product pure based on the melting point???
for part c the experiment was
Separation of acid/base/neutral compounds using liquid- liquid
extraction of benzocaine-trans-cinnamic acid and biphenyl
what was the purpose of using Na2SO4
estion 6: 100mg of each Acid, Base and Neutral compounds were used. Assuming 70mg mzocaine, 66mg trans-cinnamic acid and 50mg of biphenyl were isolated. a. Calculate % recovery of benzocaine, trans-cinnamic acid and biphenyl respectively. (show your calculation,...
which of the following would you expect to have a higher melting point? explain why 3....
which of the following would you expect to have a higher melting
point? explain why
3. Which of the following would you expect to have the higher melting point? Explain why. (3 marks - 1 for the answer, 2 for the explanation) CI OH
why isnt the benzoic acid answer?꙼̈ melting points of Benzoic acid and Phenyl succinate are both...
why isnt the benzoic acid answer?꙼̈
melting points of Benzoic acid and Phenyl succinate are both
121 celsius in the chart. can you please explain?꙼̈
1. An unknown compound X is one of the four compounds listed in the following table. A mixture of X with benzoic acid melts at 89°C, a mixture of X with phenylsuccinate melts at 20°C, and a mixture of X with m-aminophenol melts at 102°C. What is the identity of X? Explain Chemnical mp. ("C)...
8. Explain why trimethylamine has a considerably lower boiling point than propylamine even though both compounds...
8. Explain why trimethylamine has a considerably lower boiling point than propylamine even though both compounds have the same molecular formula.
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
Why does benzene have a much higher boiling point (80。c) than hexane (69。c), even though they...
Why does benzene have a much higher boiling point (80。c) than hexane (69。c), even though they have the same number of carbons? A) Benzene is much more polar than hexane which enhances the attractive forces between molecules and raises the boiling point. B) Benzene has fewer hydrogens than hexane. C) Benzene is planar and has delocalized electron density which increases the attractive forces between molecules and raises the boiling point. D) Benzene can covalently bond to another benzene molecule which...
- the melting point range of pure benzhydrol is ~ 15-20 °C higher than pure benzophenone. What structural feature on benzhydrol can account for this difference and how?
You may have noticed that % composition vs Melting Point graphs are given in % Mole not 96 Weight. This is because melting point depression is a colligative property (review in your general chemistry text) that depends on the moles of impurity, the same number of moles of impurity of two different compounds will cause the same melting point depression! Before the advent of mass spectrometry this was one of the techniques used to determine the molecular weight of compounds....
can you help
with part b
why isn't the product pure based on the melting point???
for part c the experiment was
Separation of acid/base/neutral compounds using liquid- liquid
extraction of benzocaine-trans-cinnamic acid and biphenyl
what was the purpose of using Na2SO4
estion 6: 100mg of each Acid, Base and Neutral compounds were used. Assuming 70mg mzocaine, 66mg trans-cinnamic acid and 50mg of biphenyl were isolated. a. Calculate % recovery of benzocaine, trans-cinnamic acid and biphenyl respectively. (show your calculation,...
which of the following would you expect to have a higher melting
point? explain why
3. Which of the following would you expect to have the higher melting point? Explain why. (3 marks - 1 for the answer, 2 for the explanation) CI OH
why isnt the benzoic acid answer?꙼̈
melting points of Benzoic acid and Phenyl succinate are both
121 celsius in the chart. can you please explain?꙼̈
1. An unknown compound X is one of the four compounds listed in the following table. A mixture of X with benzoic acid melts at 89°C, a mixture of X with phenylsuccinate melts at 20°C, and a mixture of X with m-aminophenol melts at 102°C. What is the identity of X? Explain Chemnical mp. ("C)...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
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