how would the Rf values change if eluted with hexanes using an alumina TLC plate?

Q: d. Which average molecular weight determination did the fraction 3 most significantly affect and…

A: We have to give the answer of the given questions. D. We have to tell which molecular weight…

Q: What can be described if a sample analyzed by AAS shows the following results:

A: Given atomic absorption spectrum:

Q: If the TLC plates had been developed in a more polar solvent, would retention factors on the whole…

A:

Q: Given the Rf of four spots in a normal phase paper chromatography, which of the following is the…

A:

Q: By observing the following GC trace, which peak is most likely your solvent?. Abundance (mAU) 4.504…

A: Answer. Solvent peak in gas chromatography is the one with the greater area and sharpest. Although…

Q: A student performs this and records the following data from the complted chromatogram. the solvent…

A: The  Rf value is the ratio of distance travelled by the sample (b) to the distance travelled by the…

Q: Acetone is the compound used to measure tM- : Write down the order of polarity of the compounds from…

A: Polarity is determined by Number of Polar group present in the molecule.

Q: Using the Rf of 0.9, draw the TLC plate and comment on the polarity of the molecule if the solvent…

A:

Q: You have completed a synthesis and are now obtaining a melting point of the synthesized compound.…

A:

Q: 4. You analyze a mixture of cyclopentane, pyrrolidine, and tetrahydrofuran by gas chromatography and…

A: Gas chromatogram of a mixture of three compounds cyclopentane, pyrrolidine and tetrahydrofuran

Q: If you have a sample which has an absorbance of 1.17, a molar absorptivity of 1 Mcm1, and a cuvette…

A: The given data contains, Absorbance=1.17path length=1.15 cmMolar absorptivity=1 M-1.cm-1

Q: oles of I-(x 10) noles of Pb2+ (x 10-5) noles of Pb2+ (X 10-5)

A: 1) 5 mL of 0.012 M Pb(NO3)2 gives 0.012 *5mmol= 0.06 mmol of Pb2+.

Q: Can you DRAW a TLC plate in an elution chamber that shows 3 lanes each with one spot. Label the…

A: A thin layer chromatography (TLC) is used to seperate components of mixture using thin stationery…

Q: 6. Circle which of the following you would expect to stain with KMNO, after a TLC. он HO,

A: KMnO4 is a strong oxidizing agent

Q: Solvent Front Highest point of the dye Lowest point of the dye Rf Value Baseline Chromatogram A 15.0…

A:

Q: How would I draw C9H19NO with this Hmnr data 4.6(s,2H) 3.3(s,3H) 2.2(q,2H) 1.6 (s,9H) 1.3 (t,3H)

A: First we have to determine the total number of Double Bond Equivalent of the given molecular formula…

Q: What is the concentration of an unknown sample if its optical rotation is +28.50 deg mL/dm g. Its…

A:

Q: Mass Spectrum 120 100 80 24 41 56 57 10 15 20 25 30 35 40 45 50 55 60 65 70 m/z Relative Intensity

A:

Q: The widths at half-height, wi/2, of the peaks for compounds A and B are 0.123 min and 0.299 min,…

A:

Q: 11: CH₁0 8 3.0 68 6C62 2H 2.0 1.5 1.0 1462.23 ZVSLET CCRCT 0.5 PPM 1145.86 10$9.05 ca 816 783.20

A: Double bond equivalent is DBE which helps us to get an idea about how many ring or double bond or…

Q: 7. Fill the absorbance value below; Path length % T 0.2 0.4 0.6 0.8 1.0 25 12.5 6.25 3.125 100 50…

A: The objective of the question is to fill the table with the correct absorbance values for the given…

Q: In a normal phase chromatography set up, the component that yields the highest Rf value is likely to…

A: In a normal phase chromatography set up , the conponent that yields the highest Rf value is likely…

Q: You performed a Bradford Assay and the standard curve is shown below. 1. The absorbance of your…

A: Here according to the given curve : Relationship of straight line is  y = 1.5369x And range of…

Q: Prelab Questions: 1. In the final product, triphenylmethyl ethyl ether, there is only one oxygen…

A: Sol 1)  Here, starting element are sodium triphenyl methanoate and bromo ethane.

Q: 2. Consider the following TLC plate depictions below. In each depiction, 2 unknown samples are…

A: To describe the error and the modifications in the given TLC plates.

Q: Match column A with Column B. Given: Samples were spotted on the TLC plate and after performing the…

A: This question is related to Thin Layer Chromatography. Thin-layer chromatography (TLC) is a…

Q: hates 2. In a chromatographic experiment with a nonpolar stationary phase, which compou first;…

A: Given that the coloum chromatography

Q: It is acceptable to draw the TLC spotting line with a pen as long as it is marked very lightly.…

A: False

Q: 2. Consider the following TLC plate depictions below. In each depiction, 2 unknown samples are…

A: Thin layer chromatography(TLC) is a technique which works based on the distribution or affinity of…

Q: 7.How many repeating units per molecule are there in each of the following cases: a) a sample of…

A: Number of repeating units: Teflon sample = 5000 units Polyvinyl chloride = 12000 units

Q: Would the spots on the TLC plate in Scenario 3 be visible under UV? Why or why not?

A: Thin layer chromatography is used to separate the non-volatile substances from a mixture. Here, two…

Q: 1. You know that these types of compounds can be analyzed by either GC or HPLC but you are told by…

A: GC can only apply to  analyse volatile substance while HPLC can handle any soluble compound…

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: Please help 1. Why should you never create the filter paper as you fold it? 2. Fill in the blank…

A: So the answer as follows :

Q: 5 3 2 |------------ 1 2 3 4 5 4, 1. distance in cm

A: Rf = 0.40

Q: The spectrophotometer is set at 600 nm. The absorbance of each cuvette is read. The data is shown…

A:

Q: The following data was generated by running two TLC plates with four compounds - A, B, C & D (two on…

A: Note: According to our guidelines we are supposed to answer only one question.  Kindly repost other…

Q: g) HOT h) OH Br 1) 2) CI CI CI DMAP 1) Mg(0), dry ether 2) Å 3) NH4CI, H₂O , Et3N Na₂Cr₂O7 H₂SO4,…

A: I have given the answer in the explanation section. Hope you will understand that.

Q: two different students on two different days perform the paper chromatography experiement using the…

A: Paper chromatography is a separation technique for resolving the mixture of dissolved analytes by…

Q: 0.1 g amine-containing compound is dissolved in water then diluted to 100 mL. To get the…

A: The question is based on the concept of solution and Lambert beer's law. it states that absorbance…

Q: laq letm 2. What error would be introduced into the determination of the density of the irregularly…

A: Given : irregular shaped metal pellets.  To find : effect on the density of the metals.  Solution :…

Q: What would the quality of the line-fit (R² value) be if you do not exclude experimental outliers?…

A: In statistics, an experimental outlier is a data point originated due to experimental errors which…

Q: After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40, a…

A: The ratio of the mass of solute to the mass of solution multiply by 100 is known as percent by mass.

Q: Plant pigments in spinach were separated with TLC with cellulose as the stationary phase and 80/20…

A:

Q: Different from GCMS, why is an interface needed when coupling HPLC with MS?

A: In addition to the liquid chromatography and mass spectrometry devices, an LC-MS system contains an…

Q: For a reverse phase TLC separation, which of the following molecules will elute first? a. 1 b. 2…

A: The organic compounds given are

Q: Relative Intensity 100 60 40 8 / Find out the functional group 10 20 50 40 50 60 70 1860 my 2000 Wer

A:

Q: Zn, heat 7- Succinimide

A: Succinimide is an organic compound that possesses the chemical formula of C4H5NO2. It is white in…

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.