The TLC and mp data contradict one another with regards to purity. True False

Q: Which technique separates components of amixture with different boiling points? A. filtration…

A: Distillation is the process which is used to carry separation of a mixture of the component with…

Q: What is sampling in analytical chemistry?

A: Analytical chemistry is a branch of chemistry in which we analyze the sample by different…

Q: What is the most accurate volume that the graduations can measure in this instrument? Pinch and zoom…

A: Measuring cylinder (also known as graduated cylinder) is used to quantify a certain volume of liquid…

Q: A spectrophotometric method for the quantitative determination of the concentration of Pb2+ in blood…

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Q: Using the data below, please create a calibration graph and determine the concentration of the…

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Q: Which technique is based on the stronger attractionsome components have for the stationary…

A: In chemistry, when a reaction is performed between the reactants, that just does not involve mixing…

Q: Convert 9200 dpm per in^2 to Bq/100cm^2

A: given 9200 dpm/inch2

Q: Name three common uses of High Performance Liquid Chromatography (HPLC) in the laboratory.

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Q: 1. Replicate water samples are analyzed for water hardness with the following results: 102.2, 102.8,…

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Q: These technique are time consuming, costly and frequently needcomplementary information about sizing…

A: We will determine which techniques are time consuming costly and frequently need complementary…

Q: Shown is a thin-layer chromatography (TLC) plate. In this case, a student decided not to line up the…

A: The R f factor is called retention factor. The expression to find out R f factor in thin layer…

Q: You are trying to determine the caffeine content of brand X coffee using HPLC-UV/VIS analysis. You…

A: Mean is the average of the numbers, i.e., add up all the numbers, then divide by how manynumbers…

Q: How do you determine the CMC? Click and drag the options into the four correctly ordered steps. 1.…

A: To find CMC value , we plot points on graph and determine regions two regions to through which we…

Q: e mirror image.

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Q: the VT of a column is 30 cm3 , and VS is 20 cm3 , and Vo is 7 mL, find Vi (in mL).

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Q: 1. Describe the operation of spectrophotometer.

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Q: Write three (3) things in your mind when you heard chromatography?

A: Given  Experiment: Chromatography Chromatography is the analytical technique used to isolate the…

Q: Identify the following compounds from its molecular formula and its IR and 1H NMR spectra:

A: Given,

Q: What is a standard deviation in analytical chemistry?

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Q: Approximately 15% of the particles in a shipment of silver-bearing ore are judged to be argentite…

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Q: A set of samples from an abandoned industrial site detected a suspected groundwater contaminant at a…

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Q: In three sentences, describe the principle of chromatography.

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Q: Identify the composition of the unknown from this TLC plate. A = Aspirin %3D B = Acetaminophen C =…

A: One TLC plate is given in which there are five spots. Four spots are of known compounds that are…

Q: In analytical chemistry, when and why do we do representative sampling?

A: Representative sample is defined as the small portion of the overall sample to determine the…

Q: UV-Vis Absorption is a type of O data base system O injector detector O pump Gas chromatography is…

A: Given,  UV-Vis absorption

Q: 200 180 160 140 120 100 80 60 40 20 CDS-03-756 ppm

A: Given,  C13NMR spectrum

Q: Julie has been asked to measure the concentration of a sample solution using a spectrophotometer.…

A: On dilution, the no of moles does not change. As no of moles = Molarity × Volume Thus, (Molarity ×…

Q: To run a spectrophotometry experiment, begin by warming up O the spectrophotometer and preparing the…

A: The spectrophotometer help to determine the transmission or reflection properties of any material…

Q: Principles of Chromatography

A: Definition :

Q: 100 a. 43 80 60 40 20 86 58 71 20 40 60 80 100 120 100 b. 57 80 60 29 40 86 20 20 40 60 80 100 120…

A: Mass spectra is used to measure the mass to charge ratio of molecules in a sample.

Q: 2. In UV and visible spectrophotometry, the specimen is generally dissolved in a solvent, and…

A: Given information,          In UV and visible spectrophotometry, the specimen is generally dissolved…

Q: Measurements of boiling temperatures of samples of a liquid (°C) are given below: 78.4 79.0 78.8…

A: The mean is equal to the sum of all the data values divided by the count of values in the data set.…

Q: What compounds present in a sample that can cause error in the analysis and alter desired results?…

A: Interpretation - We have to tell that due to which  compounds present in a sample that can cause…

Q: 9) The following results were obtained in the determination of Vitamin E mass in tablet samples.…

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Q: Define , describe, or illustrate the following: a. HETP b. Capacity factor c.. Selectivity…

A: The HETP is defined as a column length adequate to bring the solute in the mobile phase emitted from…

Q: A set of samples from an abandoned industrial site detected a suspected groundwater contaminant at a…

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Q: Among the requirements for a substance to be a primary standard is low hygroscopicity. A) True False

A: True.  Primary Standard should not absorb moisture from air. A substance that absorb or adsorb water…

Q: P4010 Edit

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Q: 5. What would be the effect of the following errors in chromatographic work? a. The solvent level in…

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Q: Absorbance Absorbance 1.5 1.0 0.5 0.0 1.5- 1.0 0.5 0.0 50 50 STANDARDS 100 Diet Sodas 100 Caffeine…

A: We have find out Which of the diet sodas have the lowest concentration of aspartame and Which…

Q: Retention time is the time taken for the mobile phase to reach the detector.   True False

A: Answer - The above statement is false  Explanation - Retention time - Retention time is the sum of…

Q: 50.00 45.00 40.00- 36.00 30.00 3 25.00 20.00 15.00 10.00 5.00 MM CM 0.00 0.00 120 6.00 10.00 1 14.00…

A: Area of sorbitol peak is calculated in the following step.

Q: Sample A: Sample B: Sample C: Sample D: Sample E: Sample F: 22mm 18mm 35mm 30mm 28mm 28mm 21mm 17mm…

A: Since the units are in mm, this means we are taking about some distance, length or height.

Q: Relative Intensity 100- 08 20 10 MS2014-05101CM 20 30 60 SO

A: Mass spectrometry is mainly used for the identification of molecular weight which is denoted as M+.…

Q: Describe a chromatogram and explain what type of information it contains.

A: Chemistry is a vast field of science. It involves dealing with various elements and their compounds…

Q: Give the general steps in the use of a spectrophotometer.

A: A question based on spectrophotometer, which is to be accomplished.

Q: what is chromatography?

A: Chromatography is a method which helps to separate and analyze mixtures of compounds.

Q: Draw the main components that will be present in any HPLC and GC instrument respectively.

A: The five major HPLC components and their functions   The Pump: The role of the pump is to propel…

Q: Which is more accurate, a transfer pipet or a measuring pipet? What is theuncertainty in microliters…

A: A pipette is an apparatus which is utilized to measure out and deliver out a definite volume of…