Identification of spots on the TLC plate is done by all of the following EXCEPT O Spraying with reagents O Under microscope Ultraviolet O Ultraviolet adsorbent

Q: In a warm environment, which restorative wax is recommended for surface restoration? a. opaque b.…

A: In a warm environment, which restorative wax is recommended for surface restoration?

Q: Please Answer all the following items will give thumbs up and good rating.  Matching type

A: 1) arithmetic mean 2) Degree of freedom 3) standard deviation  4) mean  deviation

Q: In HPLC, why is purging being done before analysis of samples. Outline the procedure on how purging…

A: High-performance liquid chromatography (HPLC) is one of the separation technique used to analyze of…

Q: Please enumerate and explain 1. WHAT ARE THE GENERAL RULES IN GRAMS STAINING CLASSIFICATION OF…

A: In microbiology, Gram staining is the most widely utilised, vital, and widely used differential…

Q: Study figures 31-6 a & b in chapter 31 (page 863) of your prescribed textbook, and draw separation…

A: 1

Q: PURITY TEST Instructions: Note the REFRACTIVE INDECES of each of the samples and solve for their %…

A:

Q: What if there is no stability in the emulsion?

A: The emulsion is a mixture that generally contains 2 immiscible liquids.

Q: Which technique measures secondary structure? a. Size exclusion chromatography b. Circular Dichroism…

A: The secondary structure is formed by bending of the 1o structure. In this, an intermolecular force…

Q: One of the following is not a method to break up emulsion: Select one: a. Salting-out b. Stirring c.…

A: An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or…

Q: Spinach chromatography lab: provide a short description of the following processes: a) Spinach…

A: Column chromatography is an isolation and purification technique used extensively to obtain…

Q: What are the applications of hplc?

A: High Performance liquid chromatography (HPLC) also known as High pressure liquid chromatography, is…

Q: One of the following techniques cannot be used for separation ounodwom Select one: O a.…

A: Answer - The correct option is (b) boiling point determination. The boiling point of a compound,…

Q: Identify one pro and one con for the agh observation (visual and UV/Vis)

A: A question based on UV-Visible spectroscopy that is to be accomplished.

Q: A Student attempled to Rerin a product mxture by calumo Chromatography with a silica gel Columo and…

A: The separation of mixture is generally carried by chromatography technique. There are two phases…

Q: qualitative and quantitative aspects of HPLC?

A: The testing of a substance or mixture to determine the characteristics of its chemical constituents.

Q: IUPAC and the omega-nomenclature of LCDs

A: Answer -  Omega-nomenclature - The Omega Nomenclature is almost exactly the same as the Delta…

Q: Your lab-mate observes a large amount of streaking and blurring of their samples when they visualize…

A: It is the major problem that YTLC plate seems to be blurred in the UV light.  But you can overcome…

Q: What is in a fractionating column?     Silica gel     Collected fractions     Glass or plastic…

A: Using fundamental of fraction distillation process and hardware.

Q: Why is it important to handle the TLC plate in such a way that your fingers do not come in contact…

A: Chromatography works on the principle that different compounds will have different solubilities and…

Q: Which of the following is not a type of HPLC detector? Select one: O a. Electrochemical O b.…

A: Mixture components are estimated using HPLC detectors. The actual separation in HPLC (High…

Q: TLC

A:

Q: Describe the effects of the following conditions for TLC Samples are spotted to low on the plate…

A: Samples are spotted too low on the TLC plate:It is recommended that samples should be spotted on the…

Q: B. QUALITATIVE ANALYSIS OF ORGANIC COMPOUNDS Results:(+) or(-) Element Test Name Principal Reagent…

A:

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: Chemistry 1.A fabric specimen weighs 2.341g when completely dried and 2.495g under standard…

A: Given that, for a fabric specimen  The weight of the completely dry sample is D = 2.341 g. The…

Q: HO and ?

A: Alcohol can be defined as an organic compound in which carbon atom is attached to hydroxyl group.

Q: Define the following terms used in HPLC:                      (d) sampling loops             (e)…

A: The following terms used in HPLC can be defined as :

Q: What woukd the TLC plate look like if you used a less polar solvent? (draw the three spots on the…

A: If the solvent is less polar than the compounds will not be able to move up in the TLC plate. Hence,…

Q: Liquid extraction What can you do if you don't know which layer is which in an extraction procedure?…

A: Extraction is a fundamental technique used to isolate one compound from a mixture. A liquid/liquid…

Q: In HPLC, why is purging or initialization being done before analysis of samples, explain.

A: ✓basically following two reasons for using purging and initialization during HPLC sample preparation…

Q: 1. n-heptan sample a good lubricating oil? Explain your answer

A: As per our community guidelines, as you have posted two questions and haven't specified which one…

Q: describe different type of degasser in HPLC system, and why degassing is important in the middle of…

A: Degasser is  very useful in HPLC .the main use of degasser in HPLC are  hellium sparging, sonication…

Q: Match the following terms to the following situations. * Gross Random Systematic Defect Аccuracy…

A: In determiningthe angle ofrepose, Justinforgot to mixthe rock saltand talcproperly. gross error…

Q: What is the effect of temperature on chemisorption?

A: The process that deals with the accumulation of gas-solid or liquid, or gas molecules on another…

Q: What happen to the glowing wood splint when it is inserted inside the test tube?

A: Given,          Glowing wood splint is inserted into a test tube     Required,…

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A: The Benadryl cream is actually an itch stopping cream. It is used to relieve itching and pain…

Q: Calculate the optical rotation of an unknown sample with actual rotation of -43.67 deg. Using a…

A:

Q: Which might you need to do a ninhydrin stain to visualize spots in TLC?

A: The solutions used in TLC to detect whether a reaction is taking place or not might not have colour…

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: 4. Enumerate the differences between a serological and a volumetric pipette. 5. Enumerate the uses,…

A: Pipettes are one of the most important instruments in the analytical measurements that help us in…

Q: Explain briefly a proper technique to use burette

A: A question based on tools in analytical chemistry that is to be accomplished.

Q: In TLC, point of origin refers to O The bhottom edge of the TLC plnto.

A: Question 1: Option 1 is the correct answer. The point of origin was sketched very lightly with…

Q: how does the intermolecular force of attraction lead to stain removal? state reference

A: Intermolecular forces are the type of forces operating in between the atoms or ions of different…

Q: How column is developed and solvent selection is done in HPLC?

A: HPLC stands for High-pressure liquid chromatography or high-performance liquid chromatography.HPLC…

Q: What is the line at the top of a TLC called? Select one: The origin O The end line O The solvent…

A: TLC is commonly known as thin - layer chromatography, in this method non- volatile mixture are…

Q: permanent emulsions

A: Before knowing about permanent emulsion you should know about Emulsion and emulsifier Emulsion is a…

Q: Draw a skitch for GC and HPLC instruments showing all parts

A: GC and HPLC instrumentation can be given as follows

Q: Mention the relative sizes of hard gelatin capsule with their corresponding volume and fill weight…

A: HARD GELATIN CAPSULES: Hard gelatin capsules are modern invention which created a great impact in…

Q: When would using Thin Layer Chromotography (TLC) NOT be useful in conducting an oxidation reaction?…

A: Although it is a very simple and convenient technique, one of its limitations is that it cannot tell…