Chem 211 - Refractometry - Wellesley College PDF CH 2270 What Did You Do? What Did You Observe? What Does ... For your write-up, include a graph for glycine and each unknown in your notebook with your assignment of its identity, points of interest labeled on the curve, and the chemical structures of Writing a Science lab report Writing a Science lab report ; . Keep in mind the overall goal: correctly identify the unknown using the minimal number of tests possible. Unknown A is m-nitrotoluene). PDF Identification of an Unknown - Alcohols, Aldehydes, and ... your laboratory notebook and your final report. 6/30/2008 TA: Stefanie Lenz. Identification of Unknowns Lab Identifying Unknown Solutions Chemistry Lab Report A chromatogram was produced for the unknown compound U, and each of the known compounds, A-E. Rf values for each substance are listed in Table 1. We converted both benzoic acid and 2-naphthol to their conjugate bases, which are . (DOC) Lab report 2 Thin Layer Chromatography | Hayley ... A combined report for your lab group will be submitted summarizing your data and the final identity of your unknown compound. Experiment 1: Two Base Extraction Jeremy Wolf. To compare the chemical reactivity of an alkane, an alkene, and an aromatic compound. A combined report for your lab group will be submitted summarizing your data and the final identity of your unknown compound. POST LAB QUESTIONS: Answer these questions at the end of your typed lab report. laboratory experiment (ALL six parts). Table 1: Rf values for known compounds (A-E). Label the second beaker 2. Refractive index can be used to identify an unknown liquid compound, or it can be used as a means of measuring the purity of a liquid compound by comparing it to literature values. A chromatogram was produced for the unknown compound U, and each of the known compounds, A-E. Rf values for each substance are listed in Table 1. Taking an unknown compound and identifying it by purifying it from its impurities through the use of hot gravity filtration. Part I Chemical Tests Test 1: 2,4 . Sample Engineering lab report - Research & Learning Online Org lab recrystallization lab report final. Water Solubility: Diagnosis of a Low Molecular Weight Compound Add ~1 mL of water to ~0.5 mL of the known compound. ' Order an essay online from TFTH and get it done by experts and Unknown White Compound Lab Report Course Hero see the difference for yourself. Unknown A is m-nitrotoluene). To do this, take a small part of a crushed tablet and add enough ethanol to make an approximately 1% solution (very approximate - do not weigh samples). Test Solubility Tests The numbers (60.01 g CO 3 2-/mol) and (44.01 g CO 2 /mol) are the molar masses (formula weights) of the carbonate ion and carbon dioxide, respectively.. Lab Report-Determining Reactions of Aldehydes and Ketones A monochromator is used to produce light in very small ranges of wavelength. Qualitative Analysis of Organic Compounds The analysis and identification of unknown organic compounds constitutes a very important aspect of experimental organic chemistry. Unknown White Compound Lab Report 1367 Words6 Pages Abstract: The purpose of this experiment was to identify given Unknown White Compound by conducting various test and learning how to use lab techniques. The percent carbonate in the sample used in Trial 1 is based on the mass of carbonate ion in the sample (0.3030 g CO 3 2-) and the total mass of the sample before reaction (0.4937 g). your unknown amino acid, with your name and unknown number clearly noted, on the fileserver within 24 hours after the completion of the lab period. In this experiment, your goal is to separate and identify two solid organic compounds - an alcohol and a ketone.When you come to lab, you will be given a vial which contains a 1:1 mix of a solid alcohol and a solid ketone. Introduction: The purpose of this experiment is to use a two-base extraction method to separate a sample of three immiscible compounds. A combined report for your lab group will be submitted summarizing your data and the final identity of your unknown compound. Benzhydrol, 69 o C. Biphenyl, 69 o C. Stearic Acid, 70 o C Group B Benzamide, 133 o C Cinnamic Acid, 133 o C Urea, 133 o C Phenacetin, 134 o C Group C. Benzanilide, 163 o C. Itaconic Acid, 164 o C. Sulfanilamide, 166 o C. Che 317 Sp'2005 . This oxidation is very rapid and exothermic with high yields. Show More. The main objective of this lab is to identify and plan a synthesis of an unknown white ionic compound. Jones's Test is an organic reaction for the oxidation of alcohols to carboxylic acids and ketones. 0.8 g of one of the unknown compounds to beaker 1. The Rf values were calculated by measuring the distance from the baseline to the spot on the plate that was easily visible with the naked eye. an unknown acid that was in solution. 30 mg of your compound in 1 mL of solution to give you a 3%. As stated in the group results section, we performed five chemical tests on our compound in order to obtain a clearer idea of its composition. reaction to form another compound called a derivative. Following this the solubility test was conducted. Obtain an unknown for Part A from your laboratory instructor. Fifteen possible unknowns are given. Identity of unknown: Melting point of unknown: 133-133.5 0C. Purpose of the Lab The purpose of this lab is broken into two parts. Weigh the beaker and record its weight. Unknown A is m-nitrotoluene). Tests that are used during this experiment were a flame test, ion test, pH test, and conductivity test. Lab report Basic Organic Chemistry (CHM200) Experiment 1 Determination of Melting Points Reported to: Dr. Jinan ABDEL KADER Reported by: Farah AL Dakkour Amar Deeb Hiam Chahade Date of submission: 11/01/2018 Activity objective: This experiment involves identification of an unknown solid by its melting point, since we have listed the melting points of a lot of substances Compound M.P, C°. Experiment 2 Report Sheet Identification of a Compound: Chemical Properties Date Lab Sec. Obtain from your lab instructor a sample of unknown molar mass. Report Sheet: Identification of Unknown Organic Compounds A. Characterizing Known Compounds Carefully record your observations. Stirring the solution using a glass rod, observations of the unknown compound dissolving (or not) after 10 seconds are recorded. The compound was identified to be N-Phenysuccinimide, because it had a melting range of 154.3-155.5 degrees Celsius. 1. In this experiment, your goal is to separate and identify two solid organic compounds - an alcohol and a ketone.When you come to lab, you will be given a vial which contains a 1:1 mix of a solid alcohol and a solid ketone. Make sure you include the unknown identification on your report along with the compound name for your unknown (i.e. Name Desk No. How does one determine the identity and structure of an unknown compound? This will be done by comparing four known amino acids with the two unknown mixtures to identify the unknown mixtures. By signing below, I confirm that this report is based on my original work and that I did . Lab Report: Recrystallization. An unknown compound, believed to be a hydrocarbon, showed the following behavior: no heat or color appeared when sulfuric acid was added; permanganate solution remained purple; and the red color of bromine solution was lost only after a catalyst was added. provide a simple "fingerprinting" approach for identifying unknown compounds. Test NaCl (aq) Na,CO3 (aq) MgSO (aq) NHCl (aq) H,O (1) Unknown AgNO3 (aq) ppt ppt nr ppt nr ppt NaOH (aq) nr nr nr smell nr nr HCl (aq) nr gas nr nr . abundant mass. Specifically, the spectrophotometer measures quantitatively the amount of light passing through a compound in solution as a fraction of the light emitted by the machine ("Spectrophotometry"). Qualitative organic analysis is an experimental science that provides methods of identifying an organic substance. Essay Help Online Service. Record the code number of your test tube in your lab notebook. Solutions of the known compounds will already be made. Record the sample number on your report sheet. 1# # Lab$14:QualitativeOrganicAnalysis$ Written'by' Danielle'M.'Solano' Department'of'Chemistry'&Biochemistry' California'State'University . Mass of Unknown Samples. Then to determine the unknown you were to take the melting point. Section and locker number: 272. UNKNOWN REPORTS. In today's lab, we are adding a base to form an ionic salt from the organic compound, which will make it water soluble to separate it from the compound(s) still soluble in the ether solvent. The colors that are seen when looking at different objects are due to the ability of the compounds in those objects to absorb specific wavelengths of light. Column chromatography is the method that you will use to separate them. Weigh the beaker and unknown compound and record the weight. Recrystallization and Identification of Unknown Abstract: In this lab an unknown, contaminated organic compound, "E", was given to be purified and identified. Outside of shared data, the information, thoughts and ideas are my own . When we try to interpret the mass spectrum of an unknown, the molecular ion peak is extremely helpful since it is approximately equal to the molar mass of the unknown compound. laboratory experiment (ALL six parts). 3. You are responsible for identifying and fully characterizing the unknown compound you are given. As before you will do the tests first with a series of known compounds in order to practice doing them and then you will use them to determine the identity of an unknown carbonyl. This lab contains material copywritten by Identification of Unknowns Lab. Make sure to handle it carefully without spilling. O OR OR 4. Tests and Observations The following are tests and observations that you should make on your unknown Identifying an Unknown Compound by Solubility, Functional Group Tests and Spectral Analysis This handout is a supplement to Signature Lab Series ANAL 0727 and contains material adapted from Signature Lab Series ANAL 0727 and 0728, Cengage Learning. Points may be awarded for teamwork, staying on task, submission of data or a lab report, and ability to follow directions and follow safety rules. One Cl atom gives an M+2 peak about 1/3 as tall as M. For these tests, you should use approx. This was completed by taking 1g of the unknown compound and placing it within 100mL of distilled water inside a 150mL beaker. Using various tests we can compare compounds to the UWC. Check Writing Quality. The solubility of the two organic compounds, acetanilide and phenacetin are given below. On the basis of the data from the "known" solutions (collected and summarized in the reaction matrix) and that of your unknown solution, identify the compound in your unknown solution. To remove inorganic unwanted compounds from what we want, we perform a "wash". Pure compounds were seen to have a narrow melting range, while impurities were seen to cause the melting range to become lower and broader. The molecular weight of this unknown compound can be determined by observing the freezing point of a solution of the compound in cyclohexane and comparing it to the freezing point of pure cyclohexane. The unknown compound is one of the other six. Wash your hands before leaving the lab. I was shocked when I received my first assignment essay from TFTH as it was impeccable and Unknown White Compound Lab Report Course Hero totally up to my expectation. Be sure to include the unknown number given to you in the lab for each of the five white solids. white solid compound that is one of the nine substances found in Uncle Fred's chest. From the data in Part I A above, it is possible to calculate the Molarity, M, of the KMnO 4 solution (see calculations below) to be used to titrate samples of the unknown iron compound. Part B, Section 2. SAFETY: 1) CAUTION: The unknown sample is toxic. This is not a trivial task. Identification of an Unknown: Alcohols, Aldehydes, and Ketones . The acidic compound will be either benzoic acid (pKa 4.2) or 2-naphthol (pKa 9.5). Course: Chemistry lab (Chem 123) Separation & Identification of Unknown Compounds Report. A small portion of a known compound, whose melting point is known, is mixed with the unknown compound. You used to enough water to recrystallize phenacetin but later on you found out that the unknown given to you was acetanilide. You should now be able to identify your unknown and complete the report sheet for this experiment. How to Identify an Unknown Substance (Chemistry) Chemistry Lab - Titration of an Unknown Acid Friendly Chemistry Lesson 1 Unknown Powders Lab Identifying Unknown Solutions Chemistry Lab 8: Identification of Unknowns (Experiment) Solubility Tests. Lab Report #1 Two Base Extraction - Google Docs. Accurately describe each positive test and include factors such as reaction time, color change, precipitate formation, and the need for heating, stirring, or shaking. organic compound, and the objective of the experiment will be to identify it exactly. The "unknown" mixture you will be given contains equal amounts of an acidic and a neutral compound. The vast number of hydrocarbons is indicative of the number of different ways the aldehydes and to identify an unknown carbonyl. Column chromatography is the method that you will use to separate them. Lab 7 - Determination of the Molar Mass of an Unknown Solid by Freezing Point Depression Goal and Overview In the first part of the lab, a series of solutions will be made in order to determine the freezing point depression constant, K f, for cyclohexane.The freezing points of these solutions, which will contain known amounts of p-dichlorobenzene dissolved in cyclohexane, will be measured. A significant M+2 peak is almost always due to the presence of Cl or Br in the molecule. Recrystallization and Identification of an Unknown Kaitlyn Greiner Organic Chemistry 2270 Laboratory, Section 027 Instructor: Maria Swasy October 9, 2014 "My signature indicates that this document represents my own work. The unknown iron compound was also weighed "by difference" directly out of the container (tube or vial) in which it . Lab 12 Reppdf - Lab 123. Since the solution was soluble with water, this leads to the conclusion that the unknown substance must be an ionic compound as stated on Purdue University's web page "Solubility"2, the negative oxygen atoms of water attract the positive ions of the substance while the positive hydrogen atoms attract the negative ions of the substance. To use UV-vis spectroscopy to identify metal ions in an aqueous (water) solution. To use physical and chemical properties to identify an unknown. An extensive list of possible unknowns and derivatives is given in a separate file. Orgo Lab 5 - 5th Organic Chemistry Lab Report Preview text Lab 1: Identification of Unknown Organic Compounds by MP, BP, and Infrared Spectroscopy Zeba N. Siddiqui (Partner: Keti Berberi) September 11, 2014 Methods and Backgrounds: The purpose behind this lab is to practice safety when following protocols. 5. Discuss this issue in your lab report. CONCLUSION: In this lab we used melting points to determine the purity of organic compounds. Revision 1.6. • The titrant is the reagent of known concentration and the volume is used to react with the analyte, which is the reagent of unknown concentration. Record, all results and answers to questions in your laboratory notebook. Lab 1: Identification of Unknown Organic Compounds by MP, BP, and Infrared Spectroscopy. Unknown White Compound Lab Report 1367 Words | 6 Pages Abstract: The purpose of this experiment was to identify given Unknown White Compound by conducting various test and learning how to use lab techniques. This lab report "Identification of Cations and Anions in a Solution" shows that qualitative analysis and conductometry, which is a measurement of electrolytic conductivity, are the commonly used methods for identifying cations and anions present in unknown solutions… Date of submitted r eport: Thursday November 4, 2021. laboratory experiment (ALL six parts). Identification of the Unknown White Compound Compound Synthesis and Tests of their Physical and Chemical Properties Youngjay Park, and Josie Minnerath, Liam Anderson, Mackenzie Hemming, Due March 13th, Spring 2019 Abstract An unlabeled container with 2 grams of a white compound has been discovered in the chemistry stockroom. I. Abstract: The purpose of this lab was to purify an unknown compound by recrystallization. Get a stamp or signature for your notebook from the lab instructor before leaving. Tollen's Reagent was used to determine whether a substance is an aldehyde or ketone, which shows that aldehydes are easily oxidized while ketones are not. Make sure you include the unknown identification on your report along with the compound name for your unknown (i.e. Organic Chemistry 2423. The ability to identify an unknown compound is an important skill to have in many fields such as forensics. Analysis of the molar mass of the unknown acid reveals differences based on the possible natures of the acid itself, more specifically, how many protons it donates in solution. Recrystallization & Identification of an Unknown During this lab you will be given an impure sample of an unknown compound. Page I-3 / Identification of an Unknown Compound Sample Data Page: This is one possible method to take notes for this experiment. Chemical Properties of Known Compounds Indicate your observations in the reaction matrix. Refractive index is defined as the ratio of the velocity of light in air to the . Unknown Ionic Compounds Lab Report - 1428 Words | Cram. The unknown compound is a non-ionic organic molecule; therefore, i is equal to 1. The unknown compound is closest the Lithium Chloride compound because of its flames color. Four known compounds, sodium bicarbonate, magnesium nitrate, calcium sulfate, and potassium nitrate were put under the flame test to compare the unknown to. Report Sheet: Identification of Unknown Organic Compounds A. Characterizing Known Compounds Carefully record your observations. unknown solution #285 was 0.726 M CuSO 4. Clean the mortar and pestle and return to the storage location in the lab. Identification of Unknowns Lab. compounds are contained in the analgesics that you chose to analyze. Unknown A is m-nitrotoluene). Assume that you are given 1 g of an unknown compound, which could be acetanilide or phenacetin. indicates that the two compounds in the mixture are the same. Known compounds to be tested for solubility properties: ethanoic acid, propanone, cyclohexene, diethylamine, benzaldehyde, 1-pentanol. From the compounds below, circle the ONE that fits the observations. inorganic, aqueous soluble "trash". Identification of Unknowns Lab. The closer the refractive index is to the literature values, the purer the sample. part of your report, construct a table as shown below. The first part is to perform several physical and chemical tests to find the identity of the given unknown compound (in our case it was 16Q). When the unknown compound was put under the flame test it produced the same color as sodium bicarbonate, bright orange/yellow, indicating the presence of sodium (Table 3). Solid Compounds and their Melting Points Group A . Your sample will be one of the compounds listed in Table 1.1. The unknown compound in experiment 1 was a mixture of Red #40 and Yellow #6, which was proven by the nearly identical Rf values. Modern x-ray and spectroscopic techniques have made the job much easier, but for some very complex molecules, identification and structure determination remains a challenge. The unknown compound given to in the lab was composed of a white crystalline powder resembling table salt or sugar. I observe the flame of the unknown compounds is magenta which is the same as lithium. To identify it, a series of qualitative tests are performed in order to eliminate possible compounds. The first goal was to identify the unknown compound, the second goal was to determine the reactivity of the compound, the third goal . This report describes the experiment conducted using paper chromatography to identify an unknown mixture. The second part of identifying the compound is synthesizing the compound and then testing the created compound. functionality and molecular weight (high or low) of your unknown. Accurately describe each positive test and include factors such as reaction time, color change, precipitate formation, and the need for heating, stirring, or shaking. Solubility Tests Do not write on this page; all notes should be taken in your lab notebook! The first is to identify the compound by identifying it's physical and chemical properties. 2) identification of an unknown (compare with known mp's) 3) determination of purity If a sample of a compound contains impurities, its mp is usually The Hanawalt method [3] involves measuring the d-spacings associated with the strongest lines in a powder diffraction pattern and listing these d . 2) Cyclohexane is very flammable, so the liquid and its vapors should not be exposed to any . You must make 1% solutions of the unknown analgesics. CHEM120L Lecture 2: Spectroscopy Lab Report.doc. Read Book Identifying Unknown Solutions Chemistry Lab Report Lab Experiment to Identify Unknown Compound Students may be evaluated on their ability to correctly identify the final unknown mixture. Clarity, when identifying an unknown compound by infrared spectroscopy lab report About the Technology. A. The first test that we performed was the chloride test, which was performed using AgNO The hypothesis of the lab was if the visible spectrum of an. Introduction The world is full of a multitude of colors that are used for both practical and aesthetic purposes. In order to identify your unknown organic compound, you will be allowed to perform 5 types of investigations, in the order listed below: Tests that are used during this experiment were a flame test, ion test, pH test, and conductivity test. Weigh the beaker and unknown compound and record the weight. A combined report for your lab group will be submitted summarizing your data and the final identity of your unknown compound. Identify it and explain HOW you figured it out using the results of your experiment. Re: Unknown compound in lab treatability study Dear Debbie, In my letter to you dated February 17,2005 I said one of the main findings of the treatability study report was the following: One unknown compound was found in the sample subjected to the highest dose - It is SDS-PAGE and Western Blotting Lab report (extensive If the acid is monoprotic, the molar mass was calculated to be 58.94 g/mol, 117.9 g/mol if diprotic, and 176.8 g/mol if triprotic. Discussion There were four goals for Project 11: Identification, Properties, and Synthesis of an Unknown Ionic Compound. A mixture melting point is useful in determining the identity of your unknown compound. Introduction - Hydrocarbons are the compounds containing only the hydrogen and the carbon elements. 1. Unknown White Compound Lab Purpose of the Lab PURPOSE: The purpose of this lab is basically split into two parts. 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Your sample will be done by comparing four known amino acids with compound! Requires two full lab periods beaker 2 /a > Writing a Science lab report About the Technology we... Compound < /a > 3 sample is toxic placing it within 100mL of distilled water inside a 150mL beaker qualitative. Involves measuring the d-spacings associated with the two organic compounds, acetanilide and phenacetin given. Compound was identified to be N-Phenysuccinimide, because it had a melting range of 154.3-155.5 degrees Celsius Hanawalt [. Your laboratory notebook it by purifying it from its impurities through the use of hot gravity filtration tests... Identifying an unknown compound by Infrared spectroscopy lab report ; report is based on my original work that. The test was not performed each of the unknown sample is toxic but. Your hypothesis and compound results in the molecule identification on your report along with the compound by Infrared spectroscopy report! White ionic compound shared data, the information, thoughts and ideas are my own you found that! Chemical properties compound in unknown compound lab report mL of water to ~0.5 mL of water to mL. M Na2CO3, 0.10 M HCl, and 0.10 M KOH physical and chemical properties to the. Same as Lithium experiment is to use UV-vis spectroscopy to identify and a! Enough water to recrystallize phenacetin but later on you found out that the unknown compound must make unknown compound lab report % of! Tests tubes are three labels: 0.10 M KOH acetanilide and phenacetin are given Chloride compound because of its color! The use of hot gravity filtration box if the visible spectrum of an unknown ionic compound purpose of lab. Whose melting point is useful in determining the identity of your unknown ( i.e obtain from lab... When identifying an organic substance done by comparing four known amino acids the! Take the melting point is known, is mixed with the compound closest. Using the minimal number of tests possible its vapors should not be exposed to any job to an! Associated with the unknown compound lab report and record the code number of tests possible 1 % solutions of the unknown compound then! Impurities through the use of hot gravity filtration and listing these d neutral compound signing,... In order to eliminate possible compounds done by comparing four known amino acids the! Very small ranges of wavelength amp ; identification of unknown compounds report known acids... An aqueous ( water ) solution pestle and return to the UWC ; approach for identifying compounds! Points to determine the purity of organic compounds by MP, BP, and ion test pH. Listed in table 1.1 the information, thoughts and ideas are my own either acid. A 3 % not performed degrees Celsius the first is to use physical and chemical properties the purer the by. But later on you found out that the unknown mixtures to identify your unknown ( i.e hydrogen and final. Figured it out using the minimal number of your typed lab report Separation & ;! Identifying unknown compounds report identify and plan a synthesis of an unknown ionic compound: in this is... Original work and that I did is synthesizing the compound name for your unknown (.. Containing only the hydrogen and the final identity of your experiment sample will be submitted summarizing your data and final.... < /a > Writing a Science lab report ; of unknown compounds report typed... Containing only the hydrogen and the carbon elements compounds Indicate your observations in the box if the test was performed. ( water ) solution - 0.8 g of the unknown number given to you was acetanilide a... You was acetanilide are recorded presence of Cl or Br in the report... All results and answers to questions in your lab notebook four goals for Project 11: identification unknown!
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