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QUESTION 14 Chromatography lab Which of these Rf's is the most reasonable for a metal ion...
Pre-Lab Question a) What is chromatography? What is the origin of the name? b) What is...
Pre-Lab Question a) What is chromatography? What is the origin of the name? b) What is the Rf value and how is it calculated? c) How is the Rf value used to identify the components in a mixture? d) Why must spots on the paper not be allowed to touch the solvent in the bottom of the developing chamber (600 mL beaker)?
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography?...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
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...
Case C Thin Layer Chromatography 1. TOXI-LAB is a screening method that uses: chromatography (column /...
Case C Thin Layer Chromatography 1. TOXI-LAB is a screening method that uses: chromatography (column / planar) The first step consists of the extraction of drug metabolites from biological fluids when we place the sample in a test tube containing a mixture of solvents and buffering salts that cause the extraction of basic and neutral drugs. The solvent extract of the sample is concentrated by heat and evaporation, then is deposited onto a small disc of chromatographic media (small circle...
Acetylation of ferrocene and column chromatography Lab 4: Question 3 Homework • Unanswered Important ... The...
Acetylation of ferrocene and column chromatography
Lab 4: Question 3 Homework • Unanswered Important ... The solvent is changed from petroleum ether to diethyl ether after the ferrocene is collected from the column. Why not use diethyl ether the entire time? Because diethyl ether is more polar than petroleum ether Because petroleum ether selectively elutes ferrocene since it contains more ether oxygens than diethyl ether Because diethyl ether would lead to a poorer separation of ferrocene and acetylferrocene Both a...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
Pre lab Introduction Your instructor has prepared an extract of chloroplast pigments from fresh green grass...
Pre lab
Introduction Your instructor has prepared an extract of chloroplast pigments from fresh green grass or fresh spinach. A blender was used to rupture the cells, and the pigments were then extracted with acetone, an organic solvent. Work- ing with one other student, begin this exercise by separating the pigments extracted using paper chromatography. To do this, you will apply the pig- ment extract to a cylinder of chromatographic paper. You will then place the ylinder in a jar...
Question 14 3 pts A few granules of manganese metal are placed in a solution of...
Question 14 3 pts A few granules of manganese metal are placed in a solution of nickel(II) nitrate. Which of The following does not occur? the manganese is oxidized to manganese ions nickel ion is reduced to nickel metal electrons are transferred from manganese metal to nickel ion the amount of nitrate ion in the solution changes all of these occur
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red,...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red, blue areen, and yellow. Think about what you know about colors and predict which of these might be a single colored compound and which ones might contain more than one. write down your prediction. If you have the colors listed and want a purple color, what would you do? 2) Put the following chromatography solvents in order of polarity as a chromatography solvent: acetone,...
Question 14 Which of the following is most true about the different manufacturing process structures? A...
Question 14 Which of the following is most true about the different manufacturing process structures? A workcenter is more efficient than a continuous process. b. An electronics manufacturer is a good example of a workcenter flow structure. c. Continuous processes are most appropriate for very standard, high-volume commodity products. Bulk paper production is a good example of an project layout. e. A manufacturing cell typically has the highest unit cost of production.
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
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...
Case C Thin Layer Chromatography 1. TOXI-LAB is a screening method that uses: chromatography (column / planar) The first step consists of the extraction of drug metabolites from biological fluids when we place the sample in a test tube containing a mixture of solvents and buffering salts that cause the extraction of basic and neutral drugs. The solvent extract of the sample is concentrated by heat and evaporation, then is deposited onto a small disc of chromatographic media (small circle...
Acetylation of ferrocene and column chromatography
Lab 4: Question 3 Homework • Unanswered Important ... The solvent is changed from petroleum ether to diethyl ether after the ferrocene is collected from the column. Why not use diethyl ether the entire time? Because diethyl ether is more polar than petroleum ether Because petroleum ether selectively elutes ferrocene since it contains more ether oxygens than diethyl ether Because diethyl ether would lead to a poorer separation of ferrocene and acetylferrocene Both a...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
Pre lab
Introduction Your instructor has prepared an extract of chloroplast pigments from fresh green grass or fresh spinach. A blender was used to rupture the cells, and the pigments were then extracted with acetone, an organic solvent. Work- ing with one other student, begin this exercise by separating the pigments extracted using paper chromatography. To do this, you will apply the pig- ment extract to a cylinder of chromatographic paper. You will then place the ylinder in a jar...
Question 14 3 pts A few granules of manganese metal are placed in a solution of nickel(II) nitrate. Which of The following does not occur? the manganese is oxidized to manganese ions nickel ion is reduced to nickel metal electrons are transferred from manganese metal to nickel ion the amount of nitrate ion in the solution changes all of these occur
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red, blue areen, and yellow. Think about what you know about colors and predict which of these might be a single colored compound and which ones might contain more than one. write down your prediction. If you have the colors listed and want a purple color, what would you do? 2) Put the following chromatography solvents in order of polarity as a chromatography solvent: acetone,...
Question 14 Which of the following is most true about the different manufacturing process structures? A workcenter is more efficient than a continuous process. b. An electronics manufacturer is a good example of a workcenter flow structure. c. Continuous processes are most appropriate for very standard, high-volume commodity products. Bulk paper production is a good example of an project layout. e. A manufacturing cell typically has the highest unit cost of production.
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