Homework Answers
14) Distillation should run slowly so that all vapours get condensed to liquid when come in contact with condenser. Also many liquid compound are flammable thus rapid heating may ignite them when they come in contact with heat source.
15) Lowering the pressure of distillation reduce the boiling point of liquid hence liquid boils at lower temperature.
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14. Why should you run a distillation of two liquid rather slowly than wo liquid rather...
Give some reasons that would lead you to purify a liquid by using vacuum distillation rather...
Give some reasons that would lead you to purify a liquid by using vacuum distillation rather than by using simple distillation.
1. Briefly expalin why you should not add boiling chips to a boiling liquid? 2. Briefly...
1. Briefly expalin why you should not add boiling chips to a boiling liquid? 2. Briefly explain how and why you should position the thermometer in the distillation head during a distillation b) What is the purpose of the outer jacket on a fractionating column? c) How is the rate of heating adjusted when using a sand bath as a heat source? d) How is the distillate collected in a test tube microscale distillation? 3) What effect does an increase...
2. Explain why the vacuum distillation has more advantage than the simple distillation? 3. Give two...
2. Explain why the vacuum distillation has more advantage than the simple distillation? 3. Give two examples of materials that can be purified by steam distillation. 4. What are the first and second yellow solids in this experiment?
1) Why is the column packing material used in the fractional distillation column? 2) What should...
1) Why is the column packing material used in the fractional distillation column? 2) What should be the characteristic features of an ideal column packing material? 3) Two fractional distillations are run with identical mixed samples of two liquids using different columns. In apparatus A, the column is 15 em long, and in apparatus B, the column is 25 cm long. Will one apparatus provide any better separation of the mixture then the other? If so which one and why?...
QUESTIONS ON DISTILLATION TO BE TURNED IN Name - You were to separate a mixture containing...
QUESTIONS ON DISTILLATION TO BE TURNED IN Name - You were to separate a mixture containing 20 ml of hexane and 20 ml of sodium acetate. At 60°C, the total pressure of the system is 720 torr. 1. What is the mole fraction of each component? 2. Calculate the partial pressures of the components. 3. What is the vapor pressure lowering of hexane? What other two properties, entities, or functions have similar properties as vapor pressure lowering? What happens as...
m m Liege Ammerman Campus. Department of Physical Science 2. During a fractional distillation, why is...
m m Liege Ammerman Campus. Department of Physical Science 2. During a fractional distillation, why is a better separation achieved when heat mation, why is a better separation achieved when heat is applied slowly and steadily? (2 pts) 3. Con Consider heating a pure substance, such as acetone, to its boiling point. Why doesn't all the acetone vaporize instantly when the boiling point is reached? Hint: think about the heat of vaporization. (1 pt) 4. Why is it preferable to...
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...
Why would you use ANOVA rather than multiple t tests for an experiment comparing more than...
Why would you use ANOVA rather than multiple t tests for an experiment comparing more than two treatment conditions?
a. Is distillation a purification or a characterization technique? Explain. b. Where the thermometer bulb should...
a. Is distillation a purification or a characterization technique? Explain. b. Where the thermometer bulb should be placed in order to measure the temperature of the hot vapor accurately during distillation? c. What is the purpose of the “packing” in a fractional distillation column? d. Why should a distillation flask never be more than ¾ full before starting a distillation? e. You are fractionally distilling 100 mL of a 1:1 solution of cyclohexane and toluene. After 2 mL has distilled...
Answer briefly the following questions (a) Why should a firm that incurs losses choose to produce rather than shut down?...
Answer briefly the following questions (a) Why should a firm that incurs losses choose to produce rather than shut down? (b) What happens to the short run supply when the fix cost increases?
1) Why is the column packing material used in the fractional distillation column? 2) What should be the characteristic features of an ideal column packing material? 3) Two fractional distillations are run with identical mixed samples of two liquids using different columns. In apparatus A, the column is 15 em long, and in apparatus B, the column is 25 cm long. Will one apparatus provide any better separation of the mixture then the other? If so which one and why?...
QUESTIONS ON DISTILLATION TO BE TURNED IN Name - You were to separate a mixture containing 20 ml of hexane and 20 ml of sodium acetate. At 60°C, the total pressure of the system is 720 torr. 1. What is the mole fraction of each component? 2. Calculate the partial pressures of the components. 3. What is the vapor pressure lowering of hexane? What other two properties, entities, or functions have similar properties as vapor pressure lowering? What happens as...
m m Liege Ammerman Campus. Department of Physical Science 2. During a fractional distillation, why is a better separation achieved when heat mation, why is a better separation achieved when heat is applied slowly and steadily? (2 pts) 3. Con Consider heating a pure substance, such as acetone, to its boiling point. Why doesn't all the acetone vaporize instantly when the boiling point is reached? Hint: think about the heat of vaporization. (1 pt) 4. Why is it preferable to...
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...
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