Experiment C: Identification and Separation of Dyes by TLC Pre-lab Properties: Ethyl acetate‚ ethanol‚ silica‚ azobenzene‚ azulene‚ 4-(p-nitrophenylazo) resorcinol‚ methyl red‚ bromocresol green (solubilities in water and ethanol) Purpose: To identify compounds from an unknown mixture using TLC Up to 100% of missed points can be recovered from this lab Watch the video: http://www.youtube.com/watch?v=e99nsCAsJrw (MIT) TLC plates are near the main hood DO NOT BREAK CAPILLARY TUBES Keep spots small
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role with the real life he leads. The circumstances in which one grows up in are critical factors in shaping his or her sense of self-identity. This paper attempts to explore the gender identity troubles that Cheng Dieyi has undergone in his self-identification and sexuality in the context of the environment of his upbringing. The story begins when Cheng’s mother takes her son to Master Guan and begs him to take Dieyi (whose nickname was Douzi at the time) into his opera troupe. In order to be a performer
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Standardization and Titration of an Unknown Organic Acid Overview: Methods for counting the number of molecules in a sample is a major emphasis of laboratory work. In this experiment we will use the method of titration to count the number of acid molecules in a solution. Measuring mass is a relatively easy procedure to do in the lab (although a balance is expensive). Counting the number of particles requires more effort. Molecular counting can be done by setting an unknown amount of a substance equal to
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Classification for Functional Groups Alcohols Lucas test (Differentiates primary‚ secondary‚ and tertiary alcohols) Reagent: ZnCl2 in conc. HCl Observation: Rate of reaction (tertiary alcohol> secondary alcohol> primary alcohol) Procedure: 2mL Lucas Reagent in test tube+ 3-4 drops of alcohol‚ stopper‚ shake vigorously‚ NOTE time required (less than 10m mins only) to form an emulsion or separate layers. Oxidation (Confirms if alcohol is oxidizable: presence of H in C-OH bond) Reagent:
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Using a Dumas method‚ you are asked to identify the unknown pure liquid by comparing the molar masses of the given possible substances (ethanol‚ methanol‚ isopropanol‚ acetone). Introduction Dumas Method allows us to measure the molar mass of the substance‚ using the Ideal Gas Law. The Ideal Gas Law‚ PV=nRT‚ explains the behaviour of the gases that are near 100kPa and in the room temperature. This equation shows the product of the pressure(P) and volume(V) equals to the product of the number of moles(n)
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OBJECTIVE The main objective of this experiment is to carry out qualitative analysis to identify metal cations in unknown solution 1. INTRODUCTION An unknown material can be determined by using simple chemical tests and separations which is called as inorganic qualitative analysis. The separation of cations depends on the difference in their propensity to form precipitates. Separation scheme is used to classify cation into five groups on the basis of their physical and chemical behavior opposed
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Title Identification of Analgesic Compounds Using Thin Layer Chromatography Abstract The objective of laboratory experiment six was to identify an unknown analgesic tablet using Thin Layer Chromatography (TLC) analysis. The procedure involved preparing TLC plates‚ solubilizing standard analgesics (ibuprofen‚ aspirin‚ acetaminophen‚ caffeine) and the unknown in isopropyl alcohol (IPA)‚ and developing the plates in acetone. Rf values were calculated for each compound. The unknown tablet showed an Rf
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to cocoa bottom and an unknown girl notes to help on coursework. An unknown girl A traditional indian market scene‚ set in the evening‚ it was to hot to have markets in the day‚ lit up with neon lights She tries to capture the moment‚ she is getting involved in the culture by having her hand hennad. It is a darker shade of your own skin‚ suttle. She is watching this girl ‘icing my hand’(verb(icing)) ‘in the evening bazaar for a few rupees’ india money Unknown girl refers to the lady
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Tuan Tai 1 Duong Tran Tuan Tai Professor Pham Quoc Loc ENGL - 1302 17 September 2014 Some nice quotes from unknown authors In my view‚ everyone love reading always notes their favorite quotes for their life’s guideline. To me‚ I am not really love reading but I love collecting the nice quotes. The quotes bring many meaningful‚ some are evident but some are vague. In addition‚ I also like to collect quotes from the Internet because I do not need to read whole a book and some of them never appear
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In my organization there are many types of problem identification and formulation styles but the one most used is the logical and rational style. The military organization is a complex organization and we have very little room for mistakes‚ so when making decisions it has to be the correct one the first time around. Many lives depend on these decisions so it is important for are leadership to think logical and rational. When military leaders make decisions that effect their troops there is always
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