What is the purpose of centrifuging the mixture prior to distillation? this is a question in...
What is the purpose of centrifuging the mixture prior to distillation? this is a question in a lab where we fermented glucose to make ethanol. thank you
Homework Answers
In some cases, there are suspension mixtures where the solid particles are too fine to be separated with a filter. In these cases, sometimes a centrifuge is used. Centrifuges are mechanical devices that spin at very high speeds. These high speeds allow the solid particles in suspensions to settle very quickly. For example, rather than wait for sand to slowly settle to the bottom of water, a centrifuge can cause the sand to settle in a matter of seconds.
Some examples of how centrifuges are used include separating blood into plasma and red cells, separating cream from milk, and separating uranium isotopes for nuclear power plants.
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What is the purpose of centrifuging the mixture prior to
distillation? this is a question in...
What visual criterion is to be used to assess whether the reaction mixture is dry prior to distillation?
What visual criterion is to be used to assess whether the reaction mixture is dry prior to distillation?
How can you separate a mixture of ethanol and acetone besides doing a distillation?
How can you separate a mixture of ethanol and acetone besides doing a distillation?
In the distillation set-up, what is the purpose of the water-cooled condenser? Sea water is a...
In the distillation set-up, what is the purpose of the water-cooled condenser? Sea water is a mixture which has salt, NaCl, dissolved in water. How can these compounds be separated?
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...
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...
what is the purpose of steam distillation and why is it used instead of simple distillation in limonene extraction from...
what is the purpose of steam distillation and why is it used instead of simple distillation in limonene extraction from orange peel
Pre-lab questions 1. What is the basis for separation of compounds using distillation? Why is it...
Pre-lab questions 1. What is the basis for separation of compounds using distillation? Why is it possible to separate ethanol from water using distillation? 2. What is the difference between simple and fractional distillation? Why does fractional distillation give a much better separation of substances? 3. When is vacuum distillation used, and why is it used? 4. What is an azeotrope? How does this apply to the separation we are doing in this experiment? 5. What intermolecular forces are being...
actionar distillation of the same mixture? 4. What main advantage and disadvantage can you predict about...
actionar distillation of the same mixture? 4. What main advantage and disadvantage can you predict about fractional distillation? 5. Why is it necessary to stir or add a boiling chip to the mixture being distilled?
Fraction Distillation Fraction Distillation 1. Draw and explain phase diagram of a mixture of two miscible...
Fraction Distillation Fraction Distillation 1. Draw and explain phase diagram of a mixture of two miscible components in a solution. 2. Describe the following terms in gas chromatography a. Carrier gas b. Column packing 3. What would happen to retention time? a. If we increase flow rate b. Decrease molecular weights of components
In the production of ethanol, sugar (glucose) is fermented into ethanol through the In this question...
In the production of ethanol, sugar (glucose) is fermented into ethanol through the In this question we are considering 100kg of a biofuel, with 20% sugar content by mass. a) How much (mass) of ethanol can be produced? (30 marks) b) Formulate a balanced equation for the ideal stoichiometric combustion of CzHsOH with air. (20 marks) c) Determine the LHV, per kg of ethanol, for stoichiometric combustion of liquid ethanol with air where the reactants are initially at 101.3kPa and...
In the distillation set-up, what is the purpose of the water-cooled condenser? Sea water is a mixture which has salt, NaCl, dissolved in water. How can these compounds be separated?
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...
Pre-lab questions 1. What is the basis for separation of compounds using distillation? Why is it possible to separate ethanol from water using distillation? 2. What is the difference between simple and fractional distillation? Why does fractional distillation give a much better separation of substances? 3. When is vacuum distillation used, and why is it used? 4. What is an azeotrope? How does this apply to the separation we are doing in this experiment? 5. What intermolecular forces are being...
actionar distillation of the same mixture? 4. What main advantage and disadvantage can you predict about fractional distillation? 5. Why is it necessary to stir or add a boiling chip to the mixture being distilled?
Fraction Distillation Fraction Distillation 1. Draw and explain phase diagram of a mixture of two miscible components in a solution. 2. Describe the following terms in gas chromatography a. Carrier gas b. Column packing 3. What would happen to retention time? a. If we increase flow rate b. Decrease molecular weights of components
In the production of ethanol, sugar (glucose) is fermented into ethanol through the In this question we are considering 100kg of a biofuel, with 20% sugar content by mass. a) How much (mass) of ethanol can be produced? (30 marks) b) Formulate a balanced equation for the ideal stoichiometric combustion of CzHsOH with air. (20 marks) c) Determine the LHV, per kg of ethanol, for stoichiometric combustion of liquid ethanol with air where the reactants are initially at 101.3kPa and...
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