[PARVATIBAI CHOWGULE COLLEGE(H.S.S)-MARGAO-GOA] Chemistry chart Std-XII Name______________________________________________ Class____________________________________ Div__________________ Roll No___________ Batch No_______ 1 [PARVATIBAI CHOWGULE COLLEGE(H.S.S)-MARGAO-GOA] Chemistry chart Std-XII VOLUMETRIC ANALYSIS REDOX TITRATIONS Experiment No:- 1 Date:--------------- Aim:- You are provided with two solutions as follows. Container A: -----------------M/N Stock Solution of Hydrated
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may be counterfeit‚ not containing the chemicals that it should. Panacetin should be made up of about 50 percent of the unknown component that we previously separated out of Panacetin for testing. We suspect that this unknown compound is either acetanilide or phenacetin‚ both of which can be toxic to humans. It is very important that this component is identified so that no one unknowingly takes the “Panacetin” and becomes ill or dies. This whole experiment is based on purifying and then finding
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last part of the experiment I observed the melting point of Unknown E. After finding the melting point of Unknown E‚ I used 2-Chloroacetemide with a known melting point between 116-118 degrees Celsius and mixed it with Unknown E. I also took Acetanilide with a known melting point of 114.4 degrees Celsius and mixed it with Unknown E. I then observed these melting points to try and determine the identity of Unknown E. Results: Our first known was 100 % Biphenyl. We did three trials. The following
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to be present in your sample of Panacetin (aspirin‚ acetanilide‚ and starch)‚ only starch is insoluble in the organic solvent dichloromethane (or methylene chloride)‚ CH2 Cl2. If a sample of Panacetin is dissolved as completely as possible in dichloromethane‚ the insoluble starch can be filtered out‚ leaving acetanilide and aspirin in solution. The purpose of this experiment is to extract the components of Panacetin. Although the acetanilide and aspirin are both quite insoluble in water at room
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Name: Bhumiben Shah Date: 31st Jan ‘13 EXPERIMENT # 2 RECRYSTALLIZATION; FILTRATION OBJECTIVES: 1. To perform recrystallization and filtration of given impure organic compound. 2. To purify impure acetanilide using reflux condenser apparatus and Hirsch funnel filtration. 3. To determine percentage recovery of pure material (which is)‚ purified by recrystallization and filtration. SAFETY PRECAUTIONS: 1. Operate the aspirator with the maximum water-flow using a stop cock to
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placed in its own capillary tube‚ and then a 3rd capillary tube contained a 50/50 mixture of both ingredients. The results of their melting points occurred as is what the table says below. Data of MP’s (Celsius) Table 1 Trial #1 Unknown *Acetanilide 50/50 mixtures Shininess Occurred 114 114 114 MP 115.5 115.5 115.5 Trial #2
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Superstitions About Rats | Question 1Characterisation of Aniline | Zoe la Grange | 17036283 | | Tutor: Peet van Aardt Group 51 The Characterisation of Aniline “Oh‚ for heaven’s sake‚ Aniline‚ look at you standing there… Say something girl‚ do something‚ start living in the real world!... Just get to class!”. By looking at this extract from the short story Superstitions About Rats by Lesley Emanuel‚ one can already tell that the character‚ Aniline‚ does not go out of her way to stand up for herself
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2):  During this experiment‚ we used recrystallization methods in order to help in the purification of the unknown solid‚ as well as drying and vacuum filtration. We then ground the unknown and combined it with different chemicals (such as acetanilide or phenacetin) and used the melting point ranges to determine the identity. We used the Mel-Temp method in order to measure the melting points. (It is important to remember that if a chemical is mixed with a differing chemical‚ the melting point
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Kate Kirby June 6‚ 2013 Title: Extraction of an Unknown Compound Purpose: The purpose of this experiment was to separate a mixture of two or more unknown compounds and identify them based on their melting point and reactivity with an acid or a base. Compound studied/Reactions: The organic solvent used in this experiment was methyl t-butyl ether (MTBE‚ 2-methoxy-2-methylpropane). The unknown that dissolved in the MTBE‚ but was insoluble in water. MBTE is very volatile and flammable. It was
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corrosive‚ harmful if inhaled‚ flammable and can cause burns (handle in fume hood) Gloves are recommended to avoid chemical contact with skin Reaction Scheme: Conversion of acetanilide to p-bromoacetanilide Procedure: To a 125 mL Erlenmeyer flask containing a mixture of 95% ethanol (6 mL) and acetic acid (5 mL)‚ dissolve acetanilide (7.4 mmol) and sodium bromide (1.8 g). Place the reaction flask in an ice bath (at least 5oC) for 5 minutes (keep this reaction in the hood). Add sodium hypochlorite (8
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