Include the theory of how molecules interact with and elute from molecular stationary phase of GC GC column (Hint: BP anf Polarity), the information gained from order of elution, and type of column used.

Q: The figure below shows a portion of a GC chromatogram for a mixture of two aromatic compounds…

A: To find out the retention time for component A and B given the following chromatogram.  The…

Q: Explain why neutral solutes are eluted between times t0 and tmc in micellar electrokinetic capillary…

A: The micelles induce a negative charge on the neutral molecules depending on their size, which at…

Q: Muna Al Naabi in the Analytical chemistry laboratory wanted to separate chlorophenol by liquid…

A: LIQUID CHROMATOGRAPHY(LC):  An analytical technique which is used to isolate a chemical sample into…

Q: Retention time Substance(s) Peak area (%) (min) Crude product Pure product 8.725 1,2-cyclohexanediol…

A: In the analysis of gas chromatography, the evaluation of peak area is one of the most important…

Q: 4. Chromatograms of compounds A and B were obtained at the same flow rate with two columns of equal…

A: column chromatography

Q: Chromatography

A:

Q: How to interept this data to match the structure? It gives the peak/PPM and having trouble matching…

A: The given NMR data is needed to be interpreted and the each signal obtained is needed to be assigned…

Q: 4. The chromatogram below shows the separation of a mixture obtained by gas chromatography (GC)…

A: The principle of separation in gas chromatography (GC) is based on the partitioning of the sample…

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

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: You are analyzing a forensic sample for the presence of controlled substances using HPLC. Which of…

A: Detector is given.

Q: 3. Two peaks in a particular gas chromatogram have a retention ratio of 1.25. If this mixture was…

A: The ratio of the retention periods of two peaks is known as the retention ratio in gas…

Q: Briefly explain why temperature gradients are used in Gas Chromatography

A: A temperature gradient is defined as a physical quantity which elaborates the direction and the…

Q: Jörgen et al. Extracted acrylamide from potato chips by soxhlet extraction. They used methanol as a…

A: From the unit (hours) given it can be concluded that time has been plotted in X-axis.

Q: The gas chromatogram shows three peaks in the spectrum: 3.53 min (area: 20.0 units), 3.85 min (area:…

A: Given, area for first peak at 3.53 min = 20 units            area for second peak at  3.85 min = 130…

Q: Explain the relationship between polarity of the compound and retention factor in chromatography

A: In chromatography, retention factor is the ratio of the distance travelled by the individual…

Q: In another chromatography experiment, pure chemical “A” leaves a yellow spot with an Rf = 0.49 and…

A:

Q: Maximum Advance of Mobile Phase Starting Line A) Sample 1 appears to be a homogeneous sample…

A: Thin layer chromatography (TLC) is a method of separating components of the mixture. It is based on…

Q: Which of the following statements about a gas chromatogram is correct? O Tailing indicates that the…

A: A question based on analytical separations that is to be accomplished.

Q: Explain how the separation of various components of a mixture is achieved in column chromatography.

A: Given : column chromatography. To find : separation of various components of a mixture.  Solution :…

Q: Species A and B were separated using column chromatography. The elution time for species A (1) was…

A: The theoretical plate height H = L/N where L is the length of the column and N = (tr)2/(w/4)2 where…

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: To minimize systematic errors in the separation using TLC, which of the following factors should be…

A: TLC is thin layer chromatography and used for separation and identification

Q: A mixture of four components (W-Z) was chromatographed on a silica gel column; 11 fractions were…

A: Here TlC plates is given and we have to find out with fraction should combined to get pure sample of…

Q: Analysis of an unknown plant extract yield two peaks X and Y in a chromatogram, 15.65 and 17.03 min…

A:

Q: An active air sampler was used to trap polyaromatic hydrocarbons (PAHS) in the air above the sea…

A: Flow rate = 10 L per minuteTime of airflow = 12 hoursVolume of hexane used for elution = 10…

Q: A student places an unknown sample on a thin-layer chromatography plate and develops it in…

A: The important points in the question are: An unknown sample was placed on a thin-layer…

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: what are key reactions involved in seperation of liquid mixtures by simple and fractional…

A: Introduction: Chromatography and distillation is a technique used to separate the mixture of…

Q: The solid material in column chromatography is typically referred to as: 1) the stationary phase 2)…

A: Chromatography is a technique which is used for the separation and purification of components in…

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: Determine the correlation factor k value for 56% ethyl acetate (EA) in ethyl propionate (EP)…

A: NEANEP=Number of moles of ethyl alcoholNumber of moles of ethyl propionate AEAAEP=1.19…

Q: The figure below shows a portion of a GC chromatogram for a mixture of two aromatic compounds…

A: To find out the time that components A and B spend in the stationary phase.  The chromatogram given…

Q: The following figure indicated the separation 5-hydroxymethylfurfural (HMF), patulin (PAT),…

A: To predict the order of polarity of the given compounds.

Q: 4. A student tested water with 2% NaCl as a possible solvent for the separation of a mixture that…

A: It is given that a TLC plate with 5 parallel TLC’s in which 4 TLC’s are of components and 1 TLC is…

Q: SFC combines  important advantages of gas and liquid chromatography. It is especially useful for…

A: The chromatography is the separation technique used for identification and separation of compounds…

Q: A mixture of three components is separated using paper chromatography, and each component is…

A: Given: Absorbance of standard solution- Compound A = 0.72 Compound B = 0.55 Compound C = 0.80 For…

Q: Tim is interested in analyzing for Pyraclostrobin (pesticide) in strawberries using QuECHers method…

A: 1-10 mg of pesticide is on per gram of the fruitThe tim is slicing 500mg fruit i.e. its's possible…

Q: Compare and contrast the techniques of gas liquid chromatography (GC) and liquid chromatography…

A:

Q: Retention volume in a chromatographic experiment 1) increases with decreasing length of the column…

A: Retention volume VR is the volum of eluent carrier gas admitted to the column between the injection…

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: A student used thin layer chromatography to confirm whether he could successfully separate two…

A: TLC means “Thin Layer Chromatography”. This experiment is done on Wattman paper. If the molecule has…

Q: If retention times found on a chromatogram are 0.60 min for CH4 (=tm), 7.0 min for pentane, 8.0 min…

A: We use the formula below to find Kovat's retention index(I): Kovat's retention index, I = 100*n +…

Q: With the following information for a GC analysis using an internal standard, calculate the…

A:

Q: In the determination of ethanol concentration in alcoholic beverages using the GCFID method, why do…

A: The objective of this question is to show the determination of ethanol content is essential for…

Q: Ms. Muna Al Naabi in the Analytical chemistry laboratory wanted to separate chlorophenol by liquid…

A: Number of theoretical plates and plate height can be calculated using respective formulas.