Homework Answers
Answer: No, mobile phase carry each substance along the column, not stationary phase.
Hence, this statement is False.
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Question 2 (1 point) In liquid chromatography the stationary phase carry each substance along the column....
Question 1 (1 point) Saved Chromatography is a technique that separates substances in a mixture based...
Question 1 (1 point) Saved Chromatography is a technique that separates substances in a mixture based on the interactions of the mixture components with a mobile phase and a stationary phase. True False Question 2 (1 point) Saved The mobile phase carries substances along at a rate that is dependent on the attraction of the substance to the stationary phase. True False Question 3 (1 point) Use 10 mL of 10% isopropanol followed by 10 mL of distilled water to...
Define stationary phase. O Area where the points don't move on the chromatography paper O A...
Define stationary phase. O Area where the points don't move on the chromatography paper O A solvent or mixture of solvents that flows over the moving phase. A solid phase of the system usually composed of a small piece of clay. porcelain, cellulose or other material 7. value: Required information 10.00 points The separation of a mixture occurs using chromatography because each substance in the mixture will be adsorbed to a different degree on the surface of the stationary phase....
1. What is the purpose of column chromatography 2. What is the stationary phase? Mobile phase?...
1. What is the purpose of column chromatography 2. What is the stationary phase? Mobile phase? 3. What is the purpose of the cotton (glass wool) in column chromatography? 4. What is the purpose of the sand? 5. Why is it important to prevent the column from drying? 6. What can happen if you disrupt your even layer of silica gel? 7. Which compounds come off the column first, polar or nonpolar? 8. Keyon synthesized acetylferrocene (orange) in organic chemistry...
A drug is analyzed by liquid chromatography using a column containing 1.27 mL of mobile phase...
A drug is analyzed by liquid chromatography using a column containing 1.27 mL of mobile phase and 1.66 mL of stationary phase. The retention time for an unretained com pound is 2.54 min and the retention time of the drug is 15.24 min. Calculate the partition coefficient for the drug.
Question 1: (column chromatography) a. What effect on the chromatographic separation is expected ...
Question 1: (column chromatography) a. What effect on the chromatographic separation is expected if solvent level is below the adsorbent? b. Once the chromatographic column was prepared, why was it important to allow the level of the liquid in the column to drop to the level of the stationary phase before applying the solution of the compounds to be separated? c. Name two methods of carrying out the column chromatography technique? d. What are the two methods of packing a...
As you increase the gas chromatography column temperature, analytes’ ______________ increases and stationary phase solubility _______________....
As you increase the gas chromatography column temperature, analytes’ ______________ increases and stationary phase solubility _______________. A) boiling point; increases B) vapor pressure; decreases C) vapor pressure; increases D) retention time; increases E) retention time; decreases
PART 1: In a gas chromatography experiment using a non-polar stationary phase A) solutes are eluted...
PART 1: In a gas chromatography experiment using a non-polar stationary phase A) solutes are eluted in order of increasing boiling point. B) solutes are eluted in order of increasing vapor pressure. C) solutes are eluted in order of increasing polarity. PART 2: You can improve the separation of components in gas chromatography by A) raising the temperature of the injection port. B)raising the temperature of the column isothermally. C) raising the temperature of the column programmatically.
1) Order the compounds based on their affinity for the stationary phase typically used in column...
1) Order the compounds based on their affinity for the stationary phase typically used in column or thin layer chromatography: Highest affinity to lowest affinity: Alcohols Ethers Hydrocarbons Ions 2) How many molecules of biodiesel are produced for each molecule of vegetable oil?
Each of the following statements describes a type of column chromatography. Sort the statements to the...
Each of the following statements describes a type of column chromatography. Sort the statements to the type of chromatography they describe. If a statement can describe all of the types, place that statement in the "All" category. (Note that size-exclusion chromatography may also be called gel-filtration or molecular exclusion chromatography.) Categories: Size-exclusion Chromatography, Affinity Chromatography, Ion-exchange Chromatogrpahy, and All Statements: Separate molecules by size. Separate molecules by charge. The stationary phase has a covalently bound group to which a protein...
question #2 please Reverse phase chromatography is the most common type of liquid chromatography which the...
question #2 please
Reverse phase chromatography is the most common type of liquid chromatography which the solid phase is made up of a packing material that is largely hydrophobic and the eluents are of varying polarities. In general, the more polar compounds elute first from the column followed by more hydrophobic compounds. PRELAB QUESTIONS 1. Draw structures for the following analytes for the simulation: a. acetophenone b. benzophenone c. butylparaben d. propiopheneone e. ethylparaben f. propylparaben g. ketoprofen h. 3-nitrophenol...
Question 1 (1 point) Saved Chromatography is a technique that separates substances in a mixture based on the interactions of the mixture components with a mobile phase and a stationary phase. True False Question 2 (1 point) Saved The mobile phase carries substances along at a rate that is dependent on the attraction of the substance to the stationary phase. True False Question 3 (1 point) Use 10 mL of 10% isopropanol followed by 10 mL of distilled water to...
Define stationary phase. O Area where the points don't move on the chromatography paper O A solvent or mixture of solvents that flows over the moving phase. A solid phase of the system usually composed of a small piece of clay. porcelain, cellulose or other material 7. value: Required information 10.00 points The separation of a mixture occurs using chromatography because each substance in the mixture will be adsorbed to a different degree on the surface of the stationary phase....
1. What is the purpose of column chromatography 2. What is the stationary phase? Mobile phase? 3. What is the purpose of the cotton (glass wool) in column chromatography? 4. What is the purpose of the sand? 5. Why is it important to prevent the column from drying? 6. What can happen if you disrupt your even layer of silica gel? 7. Which compounds come off the column first, polar or nonpolar? 8. Keyon synthesized acetylferrocene (orange) in organic chemistry...
A drug is analyzed by liquid chromatography using a column containing 1.27 mL of mobile phase and 1.66 mL of stationary phase. The retention time for an unretained com pound is 2.54 min and the retention time of the drug is 15.24 min. Calculate the partition coefficient for the drug.
question #2 please
Reverse phase chromatography is the most common type of liquid chromatography which the solid phase is made up of a packing material that is largely hydrophobic and the eluents are of varying polarities. In general, the more polar compounds elute first from the column followed by more hydrophobic compounds. PRELAB QUESTIONS 1. Draw structures for the following analytes for the simulation: a. acetophenone b. benzophenone c. butylparaben d. propiopheneone e. ethylparaben f. propylparaben g. ketoprofen h. 3-nitrophenol...
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