Which statement about TLC analyses is not true? *       A- The line at the base of the TLC plate should be drawn with a pencil.       B- To prevent contamination, a new capillary tube should be used to apply each sample.       C- Samples should be applied multiple times in the same place to increase the concentrations of any possible compounds in the spot.       D- A glass beaker lined with filter paper can be used as a development chamber in a TLC analysis.       E- All these statements are correct.

Q: All three of these are gas chromatography runs from my sample. I'm trying to figure out what it…

A: To find the reason for varied retention times and intensities

Q: 8. What should the height of liquid be in a TLC elution jar? a. There should be no liquid in the jar…

A: The correct answer is (b) The liquid should be just below the spot line so that it does not dissolve…

Q: Q and R will be soluble in the organic layer (ethyl acetate) – any residual inorganic material was…

A: This speration can be done by using sperating funnel and second method can be used is dstillation .

Q: 23. What would cause compounds with similar structures to be separates on a TLC plate as a…

A: The detail explaination to the above question is given in step 2.

Q: Part B. Identification of Mobile Phase for Separation of Acetanilide and Benzoic Acid Sketch your…

A: 100% Pet.ether: Std. Acetanilide Rf =0 Std. Benzoic acid Rf = 0 Mixture: Acetanilide Rf = 0 Benzoic…

Q: What happens if the spots are made too large when preparing a TLC plate for development?

A: This question is related to chromatography.

Q: The identity and ratio of solvents are necessary in chromatography for achieving a good separation.…

A: if your solvent had an overly polar TLC developer then all the components of the mixture will move…

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: The three TLC plates below show the analysis of the same mixture of two compounds. One plate was…

A: Thin layer chromatography, commonly known as TLC, is one of the analytical techniques in which the…

Q: 1. TLC a) What are the results of loading too much compound to a TLC plate? b) What would happen if…

A: The question is on TLC and the amount of compound we need to add to it.

Q: Compare and contrast a column chromatography, TLC, and GC according to stationary phase,  moving…

A:

Q: A student completes their TLC experiment, but can not visualize any spots on their plate under a UV…

A: Given: A student completes their TLC experiment, but can not visualize any spots on their plate…

Q: Different answer please with more explanation 1. Can TLC be used to identify a compound? 2.  Is it…

A:

Q: Which statement is true? Statement 1: Since tiny amounts of material are exposed on an open…

A: The answer of the above question is given in step 2

Q: Are the ammonia distillation and the AAS a macroanalysis or a microanalysis? In which analysis is…

A: Analytical chemistry involves the quantitative and qualitative analysis of substances. Macro…

Q: In column chromatography, dyes with higher polarities tend to attach to which of the forbwing? A.…

A: The correct option is (B). Column chromatography= Column chromatography is a technic which is used…

Q: She performed a normal phase chromatography to separate the components of an extract. She then…

A: Thin layer chromatography (TLC) and Rf factor

Q: The solvent level in the development chamber should be above the level of the spotted compounds on…

A: The solvent level in the development chamber should be above the level of the spotted compounds on…

Q: Regarding TLC: a) Compounds A and B are analyzed side-by-side by TLC on silica gel. The developed…

A: Thin layer chromatography is a type of adsorption chromatography for the separation of components…

Q: B. There was big news all over the internet that the Ponkan oranges that were imported from one of…

A: The objective of the question is to calculate the following parameters for the given chromatographic…

Q: Dissolve 1 mL of clove oil in 2 mL of dichloromethane. Add 10 mL of aqueous sodium hydroxide (NaOH)…

A: a) The component of clove oil that ends up in the layer containing the NaOH (sodium hydroxide) is…

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: acetophenone from hydroquinone. Would you expect acetophenone to be the top or bottom spot on the…

A: We know that tha stronger a compound is bound to adsorbent, the slower it moves up in the TLC plate.…

Q: Name 3 adsorbents used in TLC. Mention their use and properties.  Why is it important to use a…

A: 3 adsorbents used in TLC -  1. Silica gel : Silica gel is by far the most widely used adsorbent and…

Q: A student was given an unknown compound dissolved in acetone. The student decided to identify the…

A: Thin-layer chromatography is the technique that is used to separate or purify the compound from a…

Q: 7. Alex accidentally drops a TLC plate into the jar, briefly submerging the whole plate in solvent…

A: It is possible that the TLC plate was damaged when it was dropped into the solvent. When a TLC plate…

Q: Of Aspirin, ethanol, acetaminophen, ethyl acetate, hexane, and water which could go undetected…

A: HPLC or high perfomance liquid chromatography is a usefull technique to separate and analyse…

Q: Consider the following errors that could be made when running TLC. Indicate what should be done to…

A: TLC is a useful technique for separating and analyzing mixtures, but it requires careful attention…

Q: 1. Substances that interact more strongly with the mobile phase will tend to elute out more slowly.…

A: The mobile phase can be either liquid or gas in chromatography. It is passed through a…

Q: a) What would you see if you ran a Thin Layer Chromatography (TLC) on a mixture of the three solids…

A:

Q: what is the purpose of TLC Separation & Analysis of Analgesics?

A: A mixture is a type of matter which is composed of two or more substances. These are called…

Q: Q3: The Figure shown a HPLC chromatogram of two compound.Calculate the following values using the…

A:

Q: During TLC, what is the stationary phase and what is the mobile phase?

A: Chromatography is a laboratory technique for the separation of a mixture into its components. It is…

Q: Why do we use the LC (or HPLC) and GC in water analysis? What kind of analytes can be separated ?

A: Gas chromatography (GC) is the chromatographic technique that separates the constituents of a…

Q: A3 A student performing the chromophores experiment noticed no pigments on their plate after…

A: A chromophore is a part of a molecule responsible for the color of the molecule. A chromophore is a…

Q: See image below

A: Here we are required to find the compound present in each of the unknown mixture

Q: What are some ways to visualize a TLC plate? Why may it be necessary to have more than one method to…

A: TLC works on the basic principle of separation of compounds based on the interaction of the sample…

Q: if you wanted to makes the spots travel up the TLC plate further, what solvent ration would you…

A: You know that ethyl acetate is a polar solvent while hexane is a non-polar solvent.

Q: Task: You are a forensic analyst employed at the Baltimore County Forensic Lab. You plan to perform…

A: answer - The mobile phase is generally a mixture of non-polar organic solvent, while the stationary…

Q: For numbers 1-3, refer to TLC plates below, (A,B and C, from left to right) M M M H H K Sample…

A: Given that, the reaction is Hamtori (H) and Kotetsu (K) react to form Matetsu (M),i.e., H + K → M.…