The following data were obtained by gas-liquid chromatography using a 40.0 cm packed column: Air i. Compound Methylcyclohexane Methylcyclohexene Toluene Solve the following: V. vi. tR (min) 1.9 10.1 10.8 1. If a resolution of 1.5 was desired in resolving methylcyclohexene and toluene, calculate 13.3 How many plates would be required? Set up Stationary phase Mobile phase Result Separation Analysis time wb (min) ii. How long would the column if the same packing were employed? 0.77 0.81 1.05 2. What are the main distinctions between gas chromatography (GC) and thin layer chromatography (TLC) in terms of the basis of separation: i. ii. iii. iv.

The following data were obtained by gas-liquid chromatography using a 40.0 cm packed column: Air i. Compound Methylcyclohexane Methylcyclohexene Toluene Solve the following: V. vi. tR (min) 1.9 10.1 10.8 1. If a resolution of 1.5 was desired in resolving methylcyclohexene and toluene, calculate 13.3 How many plates would be required? Set up Stationary phase Mobile phase Result Separation Analysis time wb (min) ii. How long would the column if the same packing were employed? 0.77 0.81 1.05 2. What are the main distinctions between gas chromatography (GC) and thin layer chromatography (TLC) in terms of the basis of separation: i. ii. iii. iv.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: chromatography on Bio-Gel P-300. The column had a length of 37 cm and a 1.5-cm diameter. Eluate…

A: Molecular mass of transferrin = 80000 Molecular mass of ferritin = 450000 length…

Q: ) The solvent mixture used in a Paper Chromatography of Metal Ions experiment is a mixture of what…

A: “Since you have posted a question with multiple questions, we will provide the solution only to the…

Q: Silica gel column chromatography of biphenyl used 4:1 hexane:ethyl acetate as the solvent. If it…

A: In silica gel chromatography, the silica gel is the stationory phase and a volitle organic solvent…

Q: An analyte is found to elute from a reversed-phase column with a retention factor of 12.5 when a 20%…

A: Given data :- At 20% ethanol and 80% water concentration retention factor = 12.5

Q: Given : The identity of the unknown compound isolated in fraction 1 was ethyl acetate.The identity…

A: The separation of the mixture of compounds into individual compounds can be accomplished by using…

Q: In a normal-phase liquid chromatographic column, a solute was found to have a retention time of 26.7…

A: Introduction: Chromatography is a technique used to separate the mixture if solution. There are two…

Q: 6. The following data apply to a column for liquid chromatography. A chromatogram of a mixture of…

A: -------------------------------

Q: calculate the following for each sample gas chromatograph. a) retention time for each peak (label…

A: The given plot is redrawn as shown below.

Q: The following chromatogram is obtained for a mixture of substances X and Y. The retention factor for…

A: Retention factor: The ratio of distance traveled by the substance to the solvent is known as the…

Q: calculate the following for each sample gas chromatograph. a) retention time for each peak (label…

A: Gas chromatography is a technique for separating and analyzing compounds that can be vaporized…

Q: 7. The level of ethyl acetate is determined in colchicines by headspace gas Answer: 0.055. in water…

A: In the given problem the head space gas chromatography technique is used to determine the amount of…

Q: Consider the following: 4NH3 + 5O2 → 4NO + 6H2O In an experiment, 5.42 g of NH3 are allowed to…

A: Limiting reagent: It can be defined as by saying that the reagent which used up completely in a…

Q: C- CH3 C-OH A В

A: Ethyl acetate is highly polar compound solvent. As ethyl acetate contains two polar bonds(CO and CO)…

Q: An open tubular chromatography column is 28.7 m long with an inner diameter of 0.503 mm . The inside…

A: Note -Since you have posted a question with multiple sub-parts, we will solve first three sub-parts…

Q: Scientists determined the %w/w H20 in methanol by GC, using a capillary column coated with a…

A: Answer: It is the equation of a straight line. To find out the value of x, we have to put the…

Q: Paper Chromatography Calculate the Rf for a spot that travels 2.41 cm from the baseline while the…

A: The value of Rf of a compound is the ratio of the distance traveled by the compound to the distance…

Q: 24) The method of internal standard was used to analyze and measure the concentration of chemical X…

A: Volume of unknown X =3.0 mL Concentration of Y in the mixture = 1.6 x 10-5 M Volume of Y in the…

Q: 13. Electrospray time-of-flight mass spectrometry was used to analyze the eluate from a…

Q: Blandard Normal... A T Distribution Table A Chi-Squared Distr... %23 VGR This is the TLC plate for…

A: Retention factor is the distance travelled by compound divided by distance travelled by the solvent.…

Q: The following chromatogram is obtained for a mixture of substances X and Y. Calculate the resolution…

A: We would use formula to calculate resolution of these peaks .

Q: Does this method in the picture below resolve the components of the drug mixture well of a paper…

A: Gas Chromatography/Mass Spectrometry (GC/MS) and US EPA Method 8081 for Chlorinated Pesticides (GC)…

Q: A mixture of three compounds that differ in polarity can be separated by column chromatography using…

A: Column chromatography is a separation technique used to separate the mixture of organic compounds…

Question

The following data were obtained by gas-liquid chromatography using a 40.0 cm
packed column:
i.
Air
Solve the following:
iv.
Compound
Methylcyclohexane
Methylcyclohexene
Toluene
V.
vi.
tR (min)
1.9
10.1
10.8
Set up
Stationary phase
Mobile phase
Result
13.3
1. If a resolution of 1.5 was desired in resolving methylcyclohexene and toluene,
calculate
How many plates would be required?
Separation
Analysis time
wb (min)
-
0.77
0.81
2. What are the main distinctions between gas chromatography (GC) and thin
layer chromatography (TLC) in terms of the basis of separation:
i.
ii.
1.05
How long would the column if the same packing were employed?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Next, 2.00 mL of 9.63 mM S was added to 10.00 mL of a solution of unknown concentration of X, and the mixture was diluted to 25.0mL. Chromatographic analysis of this solution produced peak areas of 4822 for X and 4099 for S. What was the concentration of 5 (in mM) of the 25.0mL solution?
Consider the following chromatographic data for the separation of methylparaben from ethylparaben in a sunscreen sample. Compound Methylparaben Retention time, tr (min). Width at base of peak, Wb (min) 3.2 4.2 0.55 0.60 Ethylparaben A compound not retained by the column in this analysis had a tm of 0.75 minutes. The column used was a C18 column with a mobile phase mixture of 75% methanol and 25% water. Calculate the number of theoretical plates for ethylparaben.
What are the general characteristics of Gas Chromatography, Thin Layer Chromatography, Ion Exchange, HPLC, SEC and Affinity Chromatography? What elutes first? Additionally can you explain what exactly is stationary phase and mobile phase?
2. Thin layer chromatography was performed to find the most effective mobile phase needed to separate a mixture containing three compounds (using silica gel as the stationary phase). TLC analyses were performed using five different mobile phases: (A) pure petroleum ether; (B) 25:75 ethyl acetate:petroleum ether; (c) 50:50 ethyl acetate:petroleum ether (D) 75:25 ethyl acetate:petroleum ether; and (E) pure ethyl acetate. Using the TLC results provided, indicate whether an effective separation was achieved for each of the five mobile phases. Be sure to provide a brief explanation for your answer and identify which mobile phase(s) could be used to offer an effective separation of this mixture using column chromatography. A D E