Homework Answers
Request Answer!
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Add Answer to:
1 2. Where is the "origin" on a chromatogram? . 3. Where is the "solvent front"...
PRELABORATORY ASSIGNMENT 1. Provide the key term that corresponds to each of the following definitions. (a)...
PRELABORATORY ASSIGNMENT 1. Provide the key term that corresponds to each of the following definitions. (a) the study of compounds derived from plants and animals (b) a method for separating a mixture into its components as a result of a varying attraction of compounds for a mobile solvent on a stationary solid (c) the leading edge of the solvent, which travels from the bottom of the developing chamber to the upper portion of the chromatogram (d) refers to solvent that...
Please draw a thin chromatography plate with the following terms labelled 1. Origin 2. Stationary Phase...
Please draw a thin chromatography plate with the following
terms labelled
1. Origin 2. Stationary Phase 3. Mobile Phase 4. Solvent Front 5. Component "spot" 6. Rf value 7. Development 8. Visualization of spots Define questions 9 and 10 9. What is meant by differential partitioning between stationary and mobile phase? 10. What is the recommended procedure for cleaning a TLC spotting capillary?
1. List two errors in the typical student set up for performing thin layer chromatography illustrated...
1. List two errors in the typical student set up for performing thin layer chromatography illustrated here. 2. Define the following terms: Analyte: Stationary Phase: Mobile phase: Solvent Front: Origin: Rf Value: 3. Compound y traveled 6.2 cm while the solvent front traveled 11.1 cm. Calculate the Rf value for compound y. 4. Compound Z has an Rf value of 0725. When a chromatogram was developed, it moved 3.3 cm from the origin. How many cm did the solvent front...
8. Answer the questions based on the chromatogram shown below. Solvent Front 5.8 cm Blue Spot...
8. Answer the questions based on the chromatogram shown below. Solvent Front 5.8 cm Blue Spot 5.1 cm Green Spot 48 cm a) Which color has the strongest attraction to the stationary phase? Explain. b) Which color has the strongest attraction to the mobile phase? Explain. c) What is the retention factor (Rt) for the yellow spot? Show your work. d) What is the retention factor (Rt) for the red spot? Show your work. Yellow Spot 15 cm Red Spot...
Pre-Lab Questions Rt for A 4.8 = 0.86 1. Figure 1 is a sample paper chromatogram...
Pre-Lab Questions Rt for A 4.8 = 0.86 1. Figure 1 is a sample paper chromatogram for three samples: A, B and C. Label the drawing with the fol lowing items: the stationary phase, the mobile phase and the solvent front. R 5.6 2. Calculate the R, value for the spot in sample B using sample A as an example 3. Sample C gave two spots on the paper chromatogram What does this tell you about the composition of the...
2 Write an equation for the hydrolysis in acidic solution of the dipeptide ester aspartylpheny lalanin...
2 Write an equation for the hydrolysis in acidic solution of the dipeptide ester aspartylpheny lalanin methyl ester. This is the chemical structure of the commercial product aspartame. You may refer to Internet sources to double-check the structure you write. 3. Would you expect the dipeptide valylalanine to give a positive reactio Why or why not? n with nitric acid solution? 4. In the chromatogram below, calculate an Re for each component of the mixture. Which component is probably the...
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...
1. When 2-propanol was used as the developing solvent, two substances moved with the solvent front...
1. When 2-propanol was used as the developing solvent, two substances moved with the solvent front (Rf= 1) during TLC analysis on a silica gel plate. Can you conclude that they are identical? If not, what additional experiment(s) would you perform? 2. The Rf value of compound A is 0.34 when a TLC plate is developed in hexane and 0.44 when the plate is developed in diethyl ether. Compound B has an Rf value of 0.42 in hexane and 0.60...
an on the chromatogram, record distance traveled mcm. Pay attention to significant figures when Solvent 1...
an on the chromatogram, record distance traveled mcm. Pay attention to significant figures when Solvent 1 0.1% NaCl(aq) Solvent 2 70% isopropanol 5.0cm 24cm Lloom 0.60cm 17cm 1.8 3.4om 0.60 2.5cm 0.3 1.2 2.8cm 0.6 1.4 3.1cm 5. The molecular masses of the following five molecules are all between 85 - 95 and will not be a factor in your answers to the questions. Do not look up data; answer the questions using basic principles of intermolecular force strength. For...
Please help 2. Consider the TLC plate shown below that was done on silica gel using...
Please help
2. Consider the TLC plate shown below that was done on silica gel using a solvent mixture of 4:1 hexane/EtoAc as the eluent. 4:1 Hexane:EtOAC marked solvent front Spot B Spot A A origin (a) Which of the two organic compounds labeled A and B is less polar? (b) Calculate the Rf value of compound B. (c) How would the following changes affect the Rf values of A and B? i. Change to a more polar solvent mixture...
PRELABORATORY ASSIGNMENT 1. Provide the key term that corresponds to each of the following definitions. (a) the study of compounds derived from plants and animals (b) a method for separating a mixture into its components as a result of a varying attraction of compounds for a mobile solvent on a stationary solid (c) the leading edge of the solvent, which travels from the bottom of the developing chamber to the upper portion of the chromatogram (d) refers to solvent that...
Please draw a thin chromatography plate with the following
terms labelled
1. Origin 2. Stationary Phase 3. Mobile Phase 4. Solvent Front 5. Component "spot" 6. Rf value 7. Development 8. Visualization of spots Define questions 9 and 10 9. What is meant by differential partitioning between stationary and mobile phase? 10. What is the recommended procedure for cleaning a TLC spotting capillary?
1. List two errors in the typical student set up for performing thin layer chromatography illustrated here. 2. Define the following terms: Analyte: Stationary Phase: Mobile phase: Solvent Front: Origin: Rf Value: 3. Compound y traveled 6.2 cm while the solvent front traveled 11.1 cm. Calculate the Rf value for compound y. 4. Compound Z has an Rf value of 0725. When a chromatogram was developed, it moved 3.3 cm from the origin. How many cm did the solvent front...
8. Answer the questions based on the chromatogram shown below. Solvent Front 5.8 cm Blue Spot 5.1 cm Green Spot 48 cm a) Which color has the strongest attraction to the stationary phase? Explain. b) Which color has the strongest attraction to the mobile phase? Explain. c) What is the retention factor (Rt) for the yellow spot? Show your work. d) What is the retention factor (Rt) for the red spot? Show your work. Yellow Spot 15 cm Red Spot...
Pre-Lab Questions Rt for A 4.8 = 0.86 1. Figure 1 is a sample paper chromatogram for three samples: A, B and C. Label the drawing with the fol lowing items: the stationary phase, the mobile phase and the solvent front. R 5.6 2. Calculate the R, value for the spot in sample B using sample A as an example 3. Sample C gave two spots on the paper chromatogram What does this tell you about the composition of the...
2 Write an equation for the hydrolysis in acidic solution of the dipeptide ester aspartylpheny lalanin methyl ester. This is the chemical structure of the commercial product aspartame. You may refer to Internet sources to double-check the structure you write. 3. Would you expect the dipeptide valylalanine to give a positive reactio Why or why not? n with nitric acid solution? 4. In the chromatogram below, calculate an Re for each component of the mixture. Which component is probably the...
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...
1. When 2-propanol was used as the developing solvent, two substances moved with the solvent front (Rf= 1) during TLC analysis on a silica gel plate. Can you conclude that they are identical? If not, what additional experiment(s) would you perform? 2. The Rf value of compound A is 0.34 when a TLC plate is developed in hexane and 0.44 when the plate is developed in diethyl ether. Compound B has an Rf value of 0.42 in hexane and 0.60...
an on the chromatogram, record distance traveled mcm. Pay attention to significant figures when Solvent 1 0.1% NaCl(aq) Solvent 2 70% isopropanol 5.0cm 24cm Lloom 0.60cm 17cm 1.8 3.4om 0.60 2.5cm 0.3 1.2 2.8cm 0.6 1.4 3.1cm 5. The molecular masses of the following five molecules are all between 85 - 95 and will not be a factor in your answers to the questions. Do not look up data; answer the questions using basic principles of intermolecular force strength. For...
Please help
2. Consider the TLC plate shown below that was done on silica gel using a solvent mixture of 4:1 hexane/EtoAc as the eluent. 4:1 Hexane:EtOAC marked solvent front Spot B Spot A A origin (a) Which of the two organic compounds labeled A and B is less polar? (b) Calculate the Rf value of compound B. (c) How would the following changes affect the Rf values of A and B? i. Change to a more polar solvent mixture...
Most questions answered within 3 hours.
-
Which of the following is false regarding osmosis and diffusion?
a) A single glycogen molecule will...
asked 11 minutes ago -
20.
A diamond mine is expected to produce regular annual cash flows
of $1 million for...
asked 13 minutes ago -
Within the client’s IT system, supplier information is contained
in a supplier master file (SMF). Each...
asked 13 minutes ago -
Explain why sound travels faster in warm air than in cool air.
Suppose the room temperature...
asked 19 minutes ago -
The measured glucose level one hour after having a sugary drink
varies according to the normal...
asked 26 minutes ago -
Mic2 is a gene present on both the X and Y chromosome
of humans. Suppose a...
asked 25 minutes ago -
Consider this balanced chemical equation:
H2O2(aq)+3I−(aq)+2H+(aq)→I3−(aq)+2H2O(l)H2O2(aq)+3I−(aq)+2H+(aq)→I3−(aq)+2H2O(l)
In the first 10.0 seconds of the reaction, the concentration...
asked 28 minutes ago -
A neuropathologist is using a device with a thin circular coil
of current-carrying wire of radius...
asked 32 minutes ago -
A Carnot engine whose low-temperature reservoir is at 18.0°C has
an efficiency of 21.9%. By how...
asked 34 minutes ago -
A carpenter is making doors that are 2058.0 millimeters tall. If
the doors are too long...
asked 34 minutes ago -
Suppose you are analyzing a competitor of Levi's Luxury Shop and
determine that Current Assets are...
asked 48 minutes ago -
statistics show
that 40% of adults sleep with socks. Eight adults are randomly
selected
what is...
asked 56 minutes ago