Homework Answers
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PART 3:
This process can be explained in 3 steps:
- The first liquid which has a lower boiling point will start boiling and it's vapour temperature is observed as a platue.
- Now the first liquid with lower boiling point has completely boiled. Hence no vapours will be there since the temperature (of liquid mixture) has not still reached the boiling point of second liquid. Since there is no vapour, the thermometer (placed on top) will read a lower temperature than in the first case, that is the temperature drops.
- Now the temperature of the liquid will reach the boiling point of the second liquid and the vapours of second liquid starts to rise with comparatively higher temperature. Hence the thermometer placed on top will read a higher temperature. That is temperature rises.
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3. A mixture of two miscible liquids with widely different boiling points is distilled. The temperature of the vapo...
A simple distillation was performed to separate a mixture containing both hexane and heptane. Explain why...
A simple distillation was performed to separate a mixture containing both hexane and heptane. Explain why the observed starting vapor temperature in the simple distillation should be above the boiling point of hexane. Then, explain why if a fractional distillation was performed instead you would have a better separation (be sure to include how the fractionating column works in your explanation).
Organic Chemistry Lab Experiment 117-02 Distillation and Boiling Points- POST LAB WORKSHEET (5 pts) Consider the...
Organic Chemistry Lab Experiment 117-02 Distillation and Boiling Points- POST LAB WORKSHEET (5 pts) Consider the phase diagram below for miscible liquids 'A' and 'B 4. 120 110 100 90 80 70 0 mol% A 20 40 80 60 100 100 mol% B 60 80 40 20 a) What is the boiling point of pure 'A'? b) What is the boiling point of pure 'B'? c) What is the boiling point of an 50:50 mixture of 'A' and 'B'? d)...
o-chem lab help 6. a. A mixture of 60 mol % n-propy!cyclohexane and 40 mol %...
o-chem lab help
6. a. A mixture of 60 mol % n-propy!cyclohexane and 40 mol % n-propylbenzene is distilled through a simple distillation apparatus; assume that no fractionation occurs during the distillation. The boiling temperature is found to be 157。C (760 torr) as the first small amount of distillate is collected. The standard vapor pressures of n-propylcyclohexane and n-propylbenzene are known to be 769 torr and 725 torr, respectively, at 1573 °C Calculate the percentage of cach of the two...
can you help me with 1? It will be awesome, if I can get help on...
can you help me with 1? It will be awesome, if I can get help
on 2.. too. I kind of stuck thanks
This is a simple & fracional distillation lab btw
POST-LAB QUESTIONS: 1) Consider the fractionating column (either packed or unpacked) in the fractional distillation setup. State oOne advantage if the length of this fractionating column was doubled. State two disadvantages if the length of this fractionating column was doubled Why does one observe a drastic drop in...
Questions about distillation: Titration Data - Fractional Distillation -Simple Distillation - Temperature (Celsius) -- -- ---...
Questions about distillation:
Titration Data - Fractional Distillation -Simple Distillation - Temperature (Celsius) -- -- --- --- --- --- -- --- -- --- B.P. methanol = 65C B.P. ethanol = 78C 0 0 0 0 0 0 0 0 0 15 Volume (ml) 1. Why does the fractional distillation show no change in temperature while the system is heated and approximately 20mL is distilled? What is occurring when the temperature increases rapidly at about 25ml? 2. At 70°C, the vapour...
(b) Estimate the boiling points (b.p.) of compound C (lower boiling) and compound D (higher...
(b) Estimate the boiling points
(b.p.) of compound C (lower boiling) and compound D (higher
boiling)?
Compound C b.p.
°C Compound D b.p.
°C
A mixture of two compounds was distilled by simple and fractional distillation, with compound C being the lower boiling compound and compound D being the higher boiling compound. Graphs of temperature versus volume of distillate collected are rovided for Distillation 1 and Distillation 2 80 75 O 70 2 65 60 2 55...
2. Aliquid mixture contains two substances whose boiling points are only 10°C apart. Which method of...
2. Aliquid mixture contains two substances whose boiling points are only 10°C apart. Which method of distillation should be utilized to obtain a clean separation of the two substances. Explain. 3. Which of the following pairs of liquids could be separated by simple distillation? Why? a. Ethyl acetate (b.p. 77°C) & Phenol (b.p. 181.7°C) b. Cyclohexane (b.p. 80.7°C) & Toluene (b.p. 111C) C. Hexane (b.p. 69.10C) & Ethylbenzene (b.p. 136°C) 4. What effect would (a) an increase or (b) a...
#9. if you were trying to separate two compounds with very close boiling points how could...
#9. if you were trying to separate two compounds with very close
boiling points how could you increase the efficiency of a
fractional distillation in order to separate those compounds?
thank you!!
b. Which component should still off ist? How does the boiling point of that liquid compare to comperare mesurements at the beginning of both simple and fractional distillation? d What does this comparison tell you about the composition of the station from both simple and tractional distillation? e....
questions: 2,3, 4 and 5 please 2. How would the graph of temperature versus volume distilled...
questions: 2,3, 4 and 5 please
2. How would the graph of temperature versus volume distilled appear for a perfect separation of methanol (bp 65.4°C) and toluene (bp 110°C) using an efficient frac- tionating column? 3. The efficiency of a fractional distillation is given as the number of cycles or theo- retical plates. Traversing through steps A - D in Figure 1H-1 is equivalent to hav- ing completed two vaporization-condensation cycles or two theoretical plates. Predict the temperature of the...
9. A mixture (solution) of 3 different liquid compounds is formed. Each compound has the same...
9. A mixture (solution) of 3 different liquid compounds is formed. Each compound has the same condensed formula of C4H10O. Separate analyses of these compounds confirmed that none of the compounds has branching of C’s from the main chain of attached C atoms. Also one of the compounds experiences a weaker interparticle force as its dominant force than the other two. (a) Draw 3 possible preferred Lewis structures consistent with the above formula and information. It is desired to separate...
Organic Chemistry Lab Experiment 117-02 Distillation and Boiling Points- POST LAB WORKSHEET (5 pts) Consider the phase diagram below for miscible liquids 'A' and 'B 4. 120 110 100 90 80 70 0 mol% A 20 40 80 60 100 100 mol% B 60 80 40 20 a) What is the boiling point of pure 'A'? b) What is the boiling point of pure 'B'? c) What is the boiling point of an 50:50 mixture of 'A' and 'B'? d)...
o-chem lab help
6. a. A mixture of 60 mol % n-propy!cyclohexane and 40 mol % n-propylbenzene is distilled through a simple distillation apparatus; assume that no fractionation occurs during the distillation. The boiling temperature is found to be 157。C (760 torr) as the first small amount of distillate is collected. The standard vapor pressures of n-propylcyclohexane and n-propylbenzene are known to be 769 torr and 725 torr, respectively, at 1573 °C Calculate the percentage of cach of the two...
can you help me with 1? It will be awesome, if I can get help
on 2.. too. I kind of stuck thanks
This is a simple & fracional distillation lab btw
POST-LAB QUESTIONS: 1) Consider the fractionating column (either packed or unpacked) in the fractional distillation setup. State oOne advantage if the length of this fractionating column was doubled. State two disadvantages if the length of this fractionating column was doubled Why does one observe a drastic drop in...
Questions about distillation:
Titration Data - Fractional Distillation -Simple Distillation - Temperature (Celsius) -- -- --- --- --- --- -- --- -- --- B.P. methanol = 65C B.P. ethanol = 78C 0 0 0 0 0 0 0 0 0 15 Volume (ml) 1. Why does the fractional distillation show no change in temperature while the system is heated and approximately 20mL is distilled? What is occurring when the temperature increases rapidly at about 25ml? 2. At 70°C, the vapour...
(b) Estimate the boiling points
(b.p.) of compound C (lower boiling) and compound D (higher
boiling)?
Compound C b.p.
°C Compound D b.p.
°C
A mixture of two compounds was distilled by simple and fractional distillation, with compound C being the lower boiling compound and compound D being the higher boiling compound. Graphs of temperature versus volume of distillate collected are rovided for Distillation 1 and Distillation 2 80 75 O 70 2 65 60 2 55...
2. Aliquid mixture contains two substances whose boiling points are only 10°C apart. Which method of distillation should be utilized to obtain a clean separation of the two substances. Explain. 3. Which of the following pairs of liquids could be separated by simple distillation? Why? a. Ethyl acetate (b.p. 77°C) & Phenol (b.p. 181.7°C) b. Cyclohexane (b.p. 80.7°C) & Toluene (b.p. 111C) C. Hexane (b.p. 69.10C) & Ethylbenzene (b.p. 136°C) 4. What effect would (a) an increase or (b) a...
#9. if you were trying to separate two compounds with very close
boiling points how could you increase the efficiency of a
fractional distillation in order to separate those compounds?
thank you!!
b. Which component should still off ist? How does the boiling point of that liquid compare to comperare mesurements at the beginning of both simple and fractional distillation? d What does this comparison tell you about the composition of the station from both simple and tractional distillation? e....
questions: 2,3, 4 and 5 please
2. How would the graph of temperature versus volume distilled appear for a perfect separation of methanol (bp 65.4°C) and toluene (bp 110°C) using an efficient frac- tionating column? 3. The efficiency of a fractional distillation is given as the number of cycles or theo- retical plates. Traversing through steps A - D in Figure 1H-1 is equivalent to hav- ing completed two vaporization-condensation cycles or two theoretical plates. Predict the temperature of the...
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