molar mass for question #9 was determined by experiment to be 60.0 g/mol. What is the molecular formula? 11. Aniline‚ a starting material for urethane plastic foams‚ consists of C‚ H‚ and N. Combustion of such compounds yields CO2‚ H2O‚ and N2 as products. If the combustion of 9.71 g of aniline yields 6.63 g H2O and 1.46 g N2‚ what is its empirical formula? 12. The molar mass of aniline is 93 g/mol. What is its molecular formula? 13. Calculate the mass percent of carbon‚ nitrogen and oxygen
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the procedure outlined in Appendix A of the Lab Manual‚ approximately equal samples of p-Nitrophenol and acetanilide‚ which are known to have the same melting range of 113-114 degrees Celcius‚ were taken and inserted into the melting point apparatus. The melting points of the compounds were noted and found to be very similar. Next‚ approximately equal amounts of p-Nitrophenol and acetanilide were mixed on a clean watch glass. A sample of the mixture was placed in the Mel-temp apparatus as before
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MATERIALS Sodium nitrite Conc‚ sulphuric acid aniline N‚N-dimethylaniline nitroaniline phenol naphthol pyridine pH paper beaker‚ test tubes graduated cylinder filter paper PROCEDURES A. Preparation of Diazonium Salt Since these are immediately reacted‚ they should be prepared in parallel fashion‚ i.e. one vessel per prospective reaction. Into each vessel‚ place 1 gram or NaNO2. At 0 C‚ add a solution of 50 mg aniline in 2 mL conc H2SO4. Agitate for 5 minutes and isolate the
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Compounds by Solvent Extraction Introduction The purpose of this experiment was to use solvent extraction techniques in order to separate a mixture consisting of a carboxylic acid (p-toulic acid)‚ a phenol (p-tert-butylphenol)‚ and a neutral compound (acetanilide). Extraction is the process of selectively dissolving one or more of the compounds of a mixture into an appropriate solvent‚ the solution that contains these dissolved compounds is called an extract (Manion‚ 2004). Impurities that are present
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suspected to be Panacetin‚ a type of pain-killer. Panacetin is typically made up of sucrose‚ aspirin‚ and acetaminophen‚ but the third component in this experiment is unknown. The unknown component is suspected to be a chemical relative of acetaminophen‚ either acetanilide or phenacetin. Using techniques such as extraction‚ evaporation‚ and filtration‚ the three components will be isolated based on their solubilities and acid-base properties. Then‚ the percent composition of Panacetin can be deduced
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by : Directorate of Education‚ Delhi SOME IMPORTANT REASONING BASED QUESTIONS OF ORGANIC CHEMISTRY 1. Chlorobenzene is less reactive than chloromethane. Ans. In chlorobenzene‚ each carbon atom of benzenering is sp2 hyridised and is electron withdrawing. Chlorine atom donates a lone pair of electron and acquire positive charge. The negative charge is delocalised on ortho and para position by resonance. C-Cl bond acquires partial double bond character and is 169 pm as compared to 17.0 pm in chloromethane
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plus the poisonous chemicals necessarily handled in the production of dye stuffs. Prior to 1917 the making of aniline products in this country for use as dye stuffs amounted to next to nothing. Our company had‚ however‚ been making aniline products since 1907‚ and in no inconsiderable quantities‚ for use as explosives; so that while the dye industry is fairly new to us‚ the nature of aniline and a number of its allied products is fairly familiar. The first hazard we meet in the dye industry is from
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CHEM 2123 and 2125 – Organic Chemistry Lab I and II GUIDELINES FOR WRITING LAB REPORTS INTRODUCTION Writing reports in organic chemistry lab may differ from the way it’s done in general chemistry. One goal of this course is to introduce you to the record keeping methods used in research labs. Such methods are designed to organize experimental data in a format similar to that required for publication in major scientific journals. Here are some important considerations that apply in research settings
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addition of aniline as one of the steps. The first step involves the acylation of aniline with maleic anhydride to give maleanilic acid 1. I n the second step maleanilic acid undergoes the Michael addition of aniline and cyclization to yield I-phenyl-3-pl~enylaminopyrrolidine-2‚5dione 2 (Method A). Compound 2 can also he obtained in one step by using commercially available maleanilic acid (Merck) or‚ albeit in slightly lower overall yield‚ by refluxing maleic anhydride and aniline in 12molar
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SYNTHESIS OF 1-PHENYLAZO-2-NAPHTHOL ABSTRACT Amines are compounds composed of nitrogen atoms bearing alkyl or aromatic compounds. Amines undergo interesting reactions‚ one of which is with the reaction with nitrous acid producing an azo dye. In this study‚ the experiment focused on synthesizing an observing the physical properties of Sudan-1. Sudan-1 is of the most common dyes found in waxes‚ oils and in some food ingredients specifically curry and chilli powder. Furthermore‚ this study aimed to
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