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

Q: ff 15 13 11 76 4. in ppm) -12

A: NMR spectrum analysis

Q: Why do polar solvents destroy the absorption band's fine spectral structures?

A: Polar solvents destroy the fine spectral structures in an absorption band.

Q: Determine the isotopic peak scheme for [ReCl]+ fragment in the mass spectrum?…

A: Mass Of when Compound Different Mass isotope of both molecule is present Isotope Present Natural…

Q: Mass Spectrum 24 700 100 110 120 139 140 150 16O 170 18O 190 200 90 mie Infrared Spectrum Wave…

A: M:M+2 (3:1 ) . Therefore chlorine present. 3300 cm-1 sp C-H present. Therefore the compound is…

Q: A student has a green dye mixture on which she performs a TLC experiment with a silica gel plate and…

A: Rf value is the retention factor which is defined as the ratio of distance travelled by the solute…

Q: A 2.54 x 10- M sample of compound X in a solvent has an absorbance of 0.370 at 528 nm in a 1.000 cm…

A:

Q: In the IR Spectroscopy, describe the sample preparation techniques for: 1) solid, 2) liquid, 3) gas…

A: The cells for the sampling in IR are made up of NaCl or KBr. The glass cells cannot be used for this…

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: Referring to the chromatogram, answer the following questions. Show your calculations. 1. What is…

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

Q: A student has a purple dye mixture on which she performs a TLC experiment with a silica gel plate…

A: TLC experiment is performed on the mixture of purple dye with the help of silica gel plate and…

Q: Which is the more reliable technique for identifying an unknown compound and why? IR spectrum…

A: Every technique is important to identify a new compound.  But the answer of the question is IR…

Q: How many different  phosphorus chemical environments are there for trans-[RhClCO(PPh3)2] and cis…

A: In trans isomers ,two similar groups are attached on the opposite sides and in case of cis…

Q: True or false and why is false 8   Structures produced by X-ray diffraction are as good as the…

A:

Q: The following are spectrometric methods of analysis, except O MS NMR Polarimetric O Fractional…

A:

Q: Using the IR and NMR spectra provided, determine the molecular structure for C6H12O2. Label any…

A: Spectrum of Hexanoic acid.

Q: What characteristic makes a photodiode array spectrophotometer suitable for measuring the spectrum…

A: Ans: 1- Characteristics The following characteristic makes a photodiode array spectrophotometer…

Q: If triplicate absorbance readings of 0.419, 0.430, and 0.416 are recorded, what is the average %T…

A: The average absorbance can be calculated as follows-

Q: Q2. Briefly explain the dusting method in fingerprint analysis?

A: The process of dusting for fingerprints involves various methods intended to get the particles of…

Q: A 20.0 mL sample was analyzed using the Mohr method. Calculate the percent (w/v) Br- (FM = 79.90) if…

A: Mohr method is used for determines the Chloride/Bromide ion concentration of a solution by titration…

Q: ___________ is a method which can be used to separate enantiomers. Column chromatography Proton…

A: Given: Enantiomers To find: Method use to separate enantiomers Solution: Enantiomers are those…

Q: Why is CCL4 preferred over acetone as a solvent in running IR spectra of solids?

A: IR spectroscopy is a spectroscopic technique that is used to study and identify the chemical…

Q: Give two examples of how IR and 1H NMR could be used to assist analysis in everyday situations..

A: Answer is as follows

Q: Exp 6. IR Spectroscopy OH NaOCI ACOH, 45-50 °C CS Scanned with CamScanner

A: IR spectroscopy mainly used for the determination of functional groups present in molecules.

Q: A student completed a similar lab experiment and got an εavg of 56 M-1cm-1. If their change in…

A: Rate of a reaction is ratio of change in concentration with change in time. Here we found rate of…

Q: (iii) What would be the effect on the retention time and order of eluting if the C18 column is…

A: Answer. C18 column has 18 carbon atoms, having a longer carbon chain makes it's retention time…

Q: Sketch the spectra that would be obtained for 2-chloroethanol: The 13C NMR spectrum.

A: In the four parts of the 13C NMR spectrum shown below, There is no presence of CH3 carbon, Two…

Q: Suppose that you follow the procedure and find the absorbance of the final solution to be 0.475.…

A: Given: The calibration curve equation is, => y = 0.1216 x + 0.0189  Where y = absorbance  And x =…

Q: In spectophotometry, what should be done if there is a greater absorbance reading than the most…

A: The concentration is directly proportional to the absorbance value. That means, the higher the…

Q: 2. What type of instrumental analysis technique is used to measure the concentration of an analyte…

A:

Q: Gadolinium is used as a contrast agent in MRI. Which magnetic state of matter is characteristic of…

A: A compound or ion is said to be paramagnetic if it contains unpaired electrons in its outermost…

Q: 16) a) How can you improve the resolution between two closely spaced peaks in GC? b) What is the…

A: Resolution is a measure of How well two peaks separate. Resolution can be improved by- Increasing…

Q: What are the properties of the samples that can undergo Thermal Desorption Spectroscopy?

A: Thermal Desorption is a technology that is a very sensitive and accurate technique based on heating.…

Q: The DPD colorimetric method is used to determine the amount of residual chlorine in the sample. In…

A: The solution of the question is given below: “Since you have posted a question with multiple…

Q: Both UV/Vis and IR spectrometers can be used for quantitative analysis of analytes.   True   False

A: Given question is multiple choice question That is : Both UV/Vis and IR spectrometers can be used…

Q: When LC is coupled with mass spectrometry (MS), what are the advantages (compared to LC only) in…

A: LC-MS is an analytical technique that involves physical separation of target compounds (or analytes)…

Q: Which statement is true? Statement 1: In Thin Layer Chromatography (TLC), the polar compounds will…

A: Given data: Statement 1: In Thin Layer Chromatography (TLC), the polar compounds will have a greater…

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

A:

Q: TGA analysis

A: Ans. Thermogravimetric analysis or TGA techniques helps in determination of thermal stability of…

Q: During a Thin layer chromatography (TLC) analysis of crystallized  napthalene, what would the effect…

A: As we know, polar compound with  polar mobile phase gives higher Rf values. And non-polar compound…

Q: You are quantifying a weak base in a given aqueous solution using UV-Vis spectrophotometer. What is…

A: A multiple choice question based on quantitative analysis, which is to be accomplished.

Q: A student developed a chromatogram and found that the eluent from travelled 94 mm and the Zn^2+…

A: Given: Distance/Length that eluent travelled =94 mm Distance/Length that Zn2+ travelled =24 mm In a…

Q: Give at least two reasons for using very dilute solutions when doing fluorescence spectrometry

A: Fluorescence spectroscopy is popularly used for determine the concentration, examine the structure,…

Q: Haylee was very rushed and still needed the mp of her pure microscale unknown. She filled her…

A: The temperature at which the physical state of the substance changes form solid to liquid under the…

Q: Convert the 98% T to absorbance: а. О.008 b. 0.08 с. 0.021 d. 0.21

A: Transmittance = 98%

Q: 1) The attached picture shows the structure of aluminum axide the column chromatography stationary…

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

Q: b Give the structure of the fragment responsible for the peak at 77 m/z.

A:

Q: Why is deuterium oxide used in many NMR experiments in place of water (H2O)?

A: Applying basic concepts NMR spectroscopy.

Q: 1. Describe the different types of analytes which can be analyzed using the different methods of…

A: Two questions based on Beer-Lambert law, which are to be accomplished.

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.