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Question 19 Steam distillation process is used to separate substances which are Steam volatile Steam volatile...
Distillation 11 4. The organic liaud in Sicam distillatior vaporites at: a) Lower temperature than its...
Distillation 11 4. The organic liaud in Sicam distillatior vaporites at: a) Lower temperature than its boiling point b) Higher temperature than its boiling point c) At its boiling point d) None of the mentioned 2. In steam distillation, the liquid boils when th allation, the liquid boils when the sum of the organic liquid vapor pressure and the water vapor pressure is: a) Greater than atmospheric pressure b) Lesser than atmospheric pressure Equals to atmospheric pressure d) None of...
In order for steam distillation to be effective, the organic compounds in the mixture must be...
In order for steam distillation to be effective, the organic compounds in the mixture must be ___. miscible with water less dense than water immiscible with water more dense than water
Which technique (simple, fractional, or steam distillation) should be used to separate a hexane-water mixture.
Which technique (simple, fractional, or steam distillation) should be used to separate a hexane-water mixture.
Question 1 Which of the following is the advantage of straight packed column? Selected Answer: It...
Question 1 Which of the following is the advantage of straight packed column? Selected Answer: It can be repacked easily Answers It can be packed uniformly It can be repacked easily It is compact It is easier to heat it evenly Question 2 Which of the following statements most accurately describes thin-layer chromatography? Selected Answer: technique used to separate non-volatile mixtures, the mobile phase has different properties from the stationary phase. Answers The mobile phase is the solvent also called...
The distance that a spot of a particular compound moves up the TLC plate relative to...
The distance that a spot of a particular compound moves up the TLC plate relative to the distance moved by the solvent is called the Rf value. What does Rf stand for? a. Refractive factor b. Reflux fashion c. Raoult’s factor d. Retention factor 1 points QUESTION 2 The components of an immiscible mixture boil at _________________. a. higher temperatures than the boiling points of the individual components of the mixture b. a...
Which property or properties would be the most useful in characterizing an organic compound that a...
Which property or properties would be the most useful in characterizing an organic compound that a solid at room temperature. melting point 1L refractive index IL boiling pointIV. color is a solid at room a. b. II and IV f. II and II1 js a lvguid a rooeriy or propertis would be the most usctaul in characteriving an organic compound that I. melting point I. refractive index III. boiling pointIV. color a. b. III and IV c.? f. II and...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction solvent. B) purify an organic liquid. C) separate the components of a liquid mixture. D) purify an organic solid. E) all of the above 1. What is a limiting reactant? A) reactant with the smallest initial mass B) reactant with the largest initial mass C) reactant that is completely consumed during a chemical reaction D) reactant that is NOT completely consumed during a chemical...
Question 11 of 19 1 Points Which pair of compounds is most likely to be completely...
Question 11 of 19 1 Points Which pair of compounds is most likely to be completely miscible with one another? The term "miscible" means soluble in all proportions -- no matter how much solute is added to the solvent, a homogeneous mixture (a solution) will result. A. hexane (CH2) and water B. methanol (CH,OH) and water C. table sugar (sucrose, C12H3201) and water D. sodium chloride (NaCl) and water Reset Selection
Question 1 p Flag question Not yet answered Marked out of 1 What is an extraction?...
Question 1 p Flag question Not yet answered Marked out of 1 What is an extraction? Select one: a. Separation of compounds in a mixture based on their solubility in miscible solvents. b. Separation of compounds in a mixture based on their solubility in immiscible solvents. Question 2 Not yet answered Marked out oft Flag question In a liquid-liquid extraction the compound (or solute) prefers to be dissolved in one liquid versus the other liquid. Select one: True False Question...
Question 6 (10 pts) Steam distillation can be run more efficiently in some cases using super-heated...
Question 6 (10 pts) Steam distillation can be run more efficiently in some cases using super-heated steam at 1 atm pressure rather than boiling water. By increasing the temperature of the steam beyond the boiling point of water in a controlled fashion, the oil may still be protected from degradation while increasing its contribution to the vapor composition, making the process more efficient. At 150 °C, linalyl acetate exerts a vapor pressure of 93 torr. If a steam still were...
Distillation 11 4. The organic liaud in Sicam distillatior vaporites at: a) Lower temperature than its boiling point b) Higher temperature than its boiling point c) At its boiling point d) None of the mentioned 2. In steam distillation, the liquid boils when th allation, the liquid boils when the sum of the organic liquid vapor pressure and the water vapor pressure is: a) Greater than atmospheric pressure b) Lesser than atmospheric pressure Equals to atmospheric pressure d) None of...
In order for steam distillation to be effective, the organic compounds in the mixture must be ___. miscible with water less dense than water immiscible with water more dense than water
Question 1 Which of the following is the advantage of straight packed column? Selected Answer: It can be repacked easily Answers It can be packed uniformly It can be repacked easily It is compact It is easier to heat it evenly Question 2 Which of the following statements most accurately describes thin-layer chromatography? Selected Answer: technique used to separate non-volatile mixtures, the mobile phase has different properties from the stationary phase. Answers The mobile phase is the solvent also called...
Which property or properties would be the most useful in characterizing an organic compound that a solid at room temperature. melting point 1L refractive index IL boiling pointIV. color is a solid at room a. b. II and IV f. II and II1 js a lvguid a rooeriy or propertis would be the most usctaul in characteriving an organic compound that I. melting point I. refractive index III. boiling pointIV. color a. b. III and IV c.? f. II and...
Recrystallization is commonly used in the organic laboratory as a way to: A) remove a reaction solvent. B) purify an organic liquid. C) separate the components of a liquid mixture. D) purify an organic solid. E) all of the above 1. What is a limiting reactant? A) reactant with the smallest initial mass B) reactant with the largest initial mass C) reactant that is completely consumed during a chemical reaction D) reactant that is NOT completely consumed during a chemical...
Question 11 of 19 1 Points Which pair of compounds is most likely to be completely miscible with one another? The term "miscible" means soluble in all proportions -- no matter how much solute is added to the solvent, a homogeneous mixture (a solution) will result. A. hexane (CH2) and water B. methanol (CH,OH) and water C. table sugar (sucrose, C12H3201) and water D. sodium chloride (NaCl) and water Reset Selection
Question 1 p Flag question Not yet answered Marked out of 1 What is an extraction? Select one: a. Separation of compounds in a mixture based on their solubility in miscible solvents. b. Separation of compounds in a mixture based on their solubility in immiscible solvents. Question 2 Not yet answered Marked out oft Flag question In a liquid-liquid extraction the compound (or solute) prefers to be dissolved in one liquid versus the other liquid. Select one: True False Question...
Question 6 (10 pts) Steam distillation can be run more efficiently in some cases using super-heated steam at 1 atm pressure rather than boiling water. By increasing the temperature of the steam beyond the boiling point of water in a controlled fashion, the oil may still be protected from degradation while increasing its contribution to the vapor composition, making the process more efficient. At 150 °C, linalyl acetate exerts a vapor pressure of 93 torr. If a steam still were...
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