A fresh TLC plate is spotted with compound A,B and C, but with methylene chloride as a solvent. How does the change in solvent system affect the Rf value of compound A?

Q: Give a possible explanation why the Rf values of the dyes on the same chromatrogram are not all…

A: The ions or compounds have different polarities and polarity is the factor on which the Rf value is…

Q: Identify the products on your GC chromatogram using the Rf values of the compounds compared the Rf…

A: Gas chromatography (GC) is a form of analytical chemistry chromatography that is used to separate…

Q: Is the purpose of the reagent blank during spectroscopy to give the instrument time to “warm up” so…

A: In spectrophotometry, the signal produced by the reagent blank plays an important role in increasing…

Q: If you run a compound on 4 different TLC plates using the following four different solvent systems…

A: Option (d) pure heptane will have the highest value of Rf.

Q: Difference between Experimental IR and literature IR of pure salicylic acid Explanation on the…

A: A question based on IR spectroscopy that is to be accomplished.

Q: 1. a compound has an Rf value of 0.97 diethyl ether but an Rf value of 0.045 in cyclohexane. Suggest…

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Q: A particular mixture was seperated into three components usin paper chromatography. the Rf value of…

A: Rf value is the ratio of distance travelled by a given component to the distance travelled by the…

Q: If a compound appears single spotted on a TLC, it indicates that the compound is

A: The technique of separating components present in the mixture is termed as chromatography.…

Q: with pen and paper, can you draw what the H1 and C13 NMR spectra would look like for…

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Q: 4. Why is LaCla utilized? What changes would be needed in set up of the AAS if LaCl3 was not used?

A: Since you have asked multiple questions, we will solve the first one for you. For remaining…

Q: Provide three important/ major IR peaks associated with your spectrum of isoborneol (be certain to…

A: Given is an IR spectrum of isoborneol.To find three major peaks of this spectrum and identify the…

Q: Compound X is developed on a TLC plate using a 3:1 heptane:acetone eluent mixture. The same compound…

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Q: Which ONE of the following mobile phases would give the SHORTEST retention time of prednisolone…

A: To determine the solvent in which the prednisolone will give shortest retention time using a reverse…

Q: a) A developed TLC plate is shown. Calculate the Rf of the spot. Please show work. b) If the…

A: Rf factor of the spot = Distance travelled by the compound / Distance travelled by the solvent    =…

Q: I need help darwing a TLC plate  and figuring out the Rf values is the retention factor values We…

A: The crude mixture is the component that is obtained directly from the reaction after its completion.…

Q: What is the identity of the compound of the NMR results above? Phenylmethanol, cyclopentanol, or…

A: (a) 4.27 ppm, 1H, quintet (b) 2.54 ppm, 1H, singlet (c) 1.59 ppm, 8H, multiplet

Q: which of the following techniques would be best at determining the chemical structure of an uknown…

A: Ans: 1H NMR and 13C NMR. A compound has a taken proton nmr and 13C NMR and detail analysis of the…

Q: If we were to use Toluene as a solvent in a TLC with benzophenone, diphenyl methanol, and biphenyl…

A: TLC has two states - stationary phase and mobile phase. Here Toluene is used as non polar solvent as…

Q: Given your choice of mass spec sources: EI, CI, laser ionization, SIMS, MALDI, and electrospray, and…

A: NOTE

Q: Topic: Iodoform Test for Alcohol and Phenol Explain/Discuss the expected results for Ethanol,…

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Q: Why aspirin standard was used in making the calibration curve and not the recrystallized aspirin?…

A: The main reasons for impurities in lab synthesis are: (i) Contaminants in the reactant vessels are…

Q: Why does a sample get wet during sublimation? With drying the NMR sample with Na2SO4.

A: Na2so4 exist as  hydrate of sodium sulphate and it is highly hygroscopic in nature. That is why when…

Q: 3. With 85 % H2SO, by volume in water being used in the reaction, how many moles of water will be…

A: Since you have asked multiple questions, we will solve one question for you. If you want any…

Q: Inches Centimeters 5 21 ● A B C S Inches Centimeters 2 Starting point ----+ Unknown

A: Here we have to calculate the Rf factor for different known ( A, B , C) species and also for an…

Q: a) The structure of the compound b) The molecular ion (M*) and its corresponding m/z value (if shown…

A: Mass spectra is used to identify the mass of the compound and to know the mass fragmentation pattern…

Q: %Transmittance 105 100 95- 90 85 80 75 70 65 60- 55- 50 45- 40 35- 30- 25 20 15- 10 50 3600 0000…

A: The question is based on the concept of organic spectroscopy. We need to analyse the spectral data…

Q: Did you see any components that didn’t match the reference compounds? How do you know? If you didn’t…

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Q: Which of the compounds ( diethyl ether, hexane, benzaldehyde, ethanol ) would be eluted firstly from…

A: Chromatography is a very important tool used in the separation of the compounds. It has two…

Q: Give one advantage of the additional alternative Infrared (IR) Spectroscopy method over the current…

A: Ftir

Q: REAGENTS/PROCEDURE/TEST KMnO4 Brady's test Tollen's test Lucas reagent NaHCO3 RESULT…

A: Here we have to write the results and inference of the following given tests .

Q: identify the peaks for the IR of phenylboronic acid as seen in the photo

A: In the given question we have to identify the peaks of the IR spectrum of the given compound.The IR…

Q: What may have happened if you didn’t dilute the unknown sample and proceeded to measure the…

A: The importance of dilution in the measurement of absorbance to determine the concentration of…

Q: Determine [FeSCN2+] of the unknown in Part B using measured absorbance and the trendline of…

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Q: Analyze 3 Major IR peaks. Using 1-2 peaks, justify compunds present.

A: A question based on IR spectroscopy that is to be accomplished.

Q: Why acid is added to the solution when analyzing mixtures in the  UV-Visible absorption spectrometry

A: Acids may impact the pH of the analyte solution significantly.

Q: A dehydration experiment was performed in the lab and a GC obtained of the products. Based on the…

A: The reaction given is,

Q: Which will have the highest Rf value from a normal phase TLC? O chlorophyll O B-carotene O…

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Q: a) TLC and melting point b) IR spectroscopy c) UV-Vis spectroscopy d) NMR spectroscopy

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Q: Vanillin is the major flavor and scent compound isolated from vanilla beans. In addition to it's use…

A: The 1-HNMR chemical shifts for the given compound is as follows.

Q: Match the type of analysis output to the units appearing on its x-axis.       1H NMR spectrum…

A: Answer- In  1H NMR we plot chemical shift(in ppm) along x-axis Whereas in IR spectrum we plot…

Q: OH OH а з НО.

A: KMnO4 stain is excellent for functional groups which are sensitive to oxidation. Alkenes and alkynes…

Q: Given: A mixture of compounds A and B is spotted on a TLC plate; after developing the plate, the…

A: In thin layer chromatography, there are two phases, “one is the stationary phase and the other is…

Q: b. which molecule will have a larger Rf on a SIO₂ TLC plate using 10% Ethyl acetate/hexane as…

A: TLC: It is a separation technique used to separate components of a mixture using the different…