£ Conclusion a.Summarize the major points of your experiment. £ Questions 1. Unknown Number 117 Joel Hentrich. Spring 2014 INTRODUCTION The purpose of this study was multifaceted: First, it was completed in order to gain a better understanding of how to utilize microbiological techniques learned within the classroom and laboratory environment. c) Determine the oxidizing agent and reducing agent. Determination of the Identity of an unknown liquid My Name The date My period Partner #1 name Partner #2 name Purpose: The purpose of this lab is to determine the identity of an unknown liquid by measuring its density, melting point, boiling point, and solubility in both water and alcohol, and then National 5. Include a separate entry for the unknown solution's identification number, characteristic temperature, and concentration. 2.Consider the following redox reaction: Fe+2 (aq) + Cr2O7-2 (aq)˜ Fe+3(aq) + Cr+3 (aq) a) Determine the oxidation number for each atom. Although it is often possible to establish the structure of a compound on the basis of spectra alone (IR, NMR, etc. Flame tests can identify metals present in a sample. Before measuring the temperature, shake the cup to insure the unknown salt reacted/ dissolved completely. The correct identification for the gram positive bacterium was Bacillus cereus. i. c.Compare the experimental and true percent copper for your unknown. Get an unknown sample of salt from the instructor. Meant the solvent, ketones were to break the following experiment is reached ... salt of an enolate to. salt /100 g solvent) for all six trials. The purpose of this lab is to identify the unknown salts using the change in temperature to calculate heat realeased. How did you determine the identity of your copper salt? £ Post-lab Problems 1.Provide the molecular, complete ionic, and net ionic equation for a reaction between aqueous iron (III) chloride and aqueous sodium sulfide. b.Provide the balanced equations for all six copper salts reacting with zinc. vP�Y��-��w�������$������ݸ��p�����^U.G����M�~G�QfjK�"�z%�j��L��mF:,D���j_��Q(��C/. Reflecting back onto previous labs, what would be another way to identify the unknown copper salt? With the given “q” values for all three identiies of the unknowns, one can compare the calculated heat of the reaction to the given value to identify the salt. The B. cereus was found using the solution in the Unknown 109 test tube. xu�����?��J�f���R+8Q,���a���,�0*L(��J09t�з��^�V@_�xA8;�Ƈx��y�>{4/�5�xe}�������VovJd^{�OB]���o�/�����4���K6�`^�޳y��Y�5��ߑ�[�CΝr�Ќ\�}GŎ|pc�C�C��f��e�',��t��ws�����e>�� b.Discuss potential sources of error. The unknowns chosen were unknown “C” for trials 1 and 2, and unknwon “A” for trials 3 and 4. Remove thermometer, add 3.0grams of unknown salt into the calorimeter. Identification of Hydrates Based on Percent Water Guiding Question What is the identity of the unknown hydrate? 3. 4 0 obj £ Questions 1. Unknown Lab Report. 2-Butanone is a ketone with a boiling point of 80 degrees Celsius, and a molecular weight of 72.11 g/mol. How did you determine the identity of your copper salt? Let the salt dissolve and determine the temperature, by placing the thermometer through the top of the third cup. A combined report for your lab group will be submitted summarizing your data and the final identity of your unknown compound. %��������� d.Show all calculations. Briefly provide a stepbystep procedure for this alternate method. b.Provide the balanced equations for all six copper salts reacting with zinc. HC2H3O2 (aq) + OH (aq)˜ H2O (l) + C2H3O2 (aq) Attachments: Lab5Iden.wiz; Lab Report: £ Title Page £ Summary a.Purpose b.Determine the identity of the unknown copper salt. Originally, a sample from the Unknown tube was supposed to be inoculated on a nutrient agar … After collecting the following data and observations, the unknown liquid, #19UL11, was determined to be 2-Butanone. c.Provide the zinc elimination reaction. UNKNOWN REPORTS. The flame test yielded a color that matched that of sodium bicarbonate indicating that the unknown compound contained sodium. Reflecting back onto previous labs, what would be another way to identify the unknown copper salt? Formula of a sample still looks wet litmus paper by amylase, it in the presence of c.Include your data tables. Contact our live support team for any assistance or inquiry. £ Post-lab Problems 1.Provide the molecular, complete ionic, and net ionic equation for a reaction between aqueous iron (III) chloride and aqueous sodium sulfide. c.Compare the experimental and true percent copper for your unknown. << /Length 5 0 R /Filter /FlateDecode >> The instructor will assign the students a temperature which will be needed for the saturated solution to be prepared by the student. Lab Investigation 3 - What is the identity of the unknown hydrate? £ Introduction a.Discuss single replacement reactions. reaction of hydrogen with ferric chloride. b) Balance the equation using half-reactions. b.Discuss potential sources of error. 3.For the following reaction, label the acid, base, conjugate acid, and conjugate base. April 29 th, 2014. i. £ Results and Discussion a.Discuss your procedure with the data you collected. Summary Gravimetric analysis will be performed to identify an unknown chloride salt. This method of analysis allows for a quantitative determination of the mass percent of chlorine in the unknown through precipitation of the chloride ions in the form of silver chloride. £ Introduction a.Discuss single replacement reactions. stream c.Provide the zinc elimination reaction. PAG 5 Identify an unknown compound using cation tests, anion tests and flame tests; Scotland. Final report of the unknowns: report the unknown number, your name, appropriate properties, the results of the solubility tests, the results of the class tests (list the test and whether it was + or - or could not determine), the neutralization equivalent if taken (must be reported for all acids and bases using correct significant figures), all possible compounds within that class and close to that mp or bp (plus or minus … The initial temperature was … This will be a vital task to take with me into my profession for many reasons. Lab Report: £ Title Page £ Summary a.Purpose b.Determine the identity of the unknown copper salt. c.Include your data tables. Chemistry in society. Example of a Microbiology Unknown Lab Report by Taylor Autry Introduction. Identification of Unknown Organic Compounds Introduction The identification and characterization of the structures of unknown substances are an important part of organic chemistry. b) Balance the equation using half-reactions. Identifying an unknown chloride salt by gravimetric analysis Summary Gravimetric analysis will be performed to identify an unknown chloride salt. Report Sheet: Identification of Unknown Organic Compounds A. Characterizing Known Compounds Carefully record your observations. HC2H3O2 (aq) + OH (aq)˜ H2O (l) + C2H3O2 (aq) Attachments: Lab5Iden.wiz. SQA Chemistry. Briefly provide a stepbystep procedure for this alternate method. With the given “q” values for all three identiies of the unknowns, one can compare the calculated heat of the reaction to the given value to identify the salt. Unknown A is m-nitrotoluene). d.Show all calculations. In the medical field bacteria and infections of different kinds are the core of the practice. £ Introduction a.Discuss single replacement reactions. ), the spectra typically must be supplemented with In this paper I will discuss the processes of how I came to find my two unknown bacteria. Download Identification Of Unknown Ketones Lab Report doc. Get Help With Your Essay Determine the temperature and record results. Accurately describe each positive test and include factors such as reaction time, color change, precipitate formation, and the need for heating, stirring, or shaking. The B. cereus was found using the solution in the Unknown 109 test tube. Enter your Email id used at the time of registration and hit "Recover Password". The anion test for chloride proved to be positive, resulting in the summation that the unknown compound was sodium chloride. b.Provide the balanced equations for all six copper salts reacting with zinc. The correct identification for the gram positive bacterium was Bacillus cereus. Analytical methods. Get a 125 mL Erlenmeyer flask, add in the unknown salt sample and 40 mL of distilled water. 2.Consider the following redox reaction: Fe+2 (aq) + Cr2O7-2 (aq)˜ Fe+3(aq) + Cr+3 (aq) a) Determine the oxidation number for each atom. ���@���?T�㢗 'xٟhu��o_R��K���������͚l���9?��h��� ��P� �\���)���/��� =�ҷ9�"�S?�����!‚]�9�F��(Wt�c��ƍ�3����=D 8������'RQ*e��͢��bw=}s�ȂA���QwO��B��oD���H�#�Q�}D]�{{��a�v��8�Q�i�:�0�z:;]�� Use the scatter plot option, but do NOT connect the dots. laboratory experiment (ALL six parts). The formation of a precipitate can be used to identify the presence of a particular ion. 2. Use the order calculator below and get started! c.Provide the zinc elimination reaction. This method of analysis allows for a quantitative determination of the mass percent of chlorine in the unknown through precipitation of the chloride ions in the form of silver chloride. x�\ےG}ﯨ��4��t���`�6�� i�.��#��~�r��N֥�#�X�؞���̺tk�2ߚj0M�?��t���]�/ks����9��>_���M�����n巽8��/�}?�ߚ�ߛN(�����/��T������}���;������������������ފT�=Tm�?���c��ٙ;s�Op+� 3n��#���#�KF~�D㫛�#eC��l�:rN��)�ΨZ�b�EFm��b�;�K�.R7[b�V+�.R�ݝy����w�o࿑�f&h�j��u�շ!&v/��Nء��7�@��p����O�;�7�C���� Make sure you include the unknown identification on your report along with the compound name for your unknown (i.e. Originally, a sample from the Unknown tube was supposed to be inoculated on a nutrient agar … %PDF-1.3 Chemical analysis. £ Conclusion a.Summarize the major points of your experiment. You should submit an Unknown Preliminary Report as soon as you have completed the experiments described below:. £ Results and Discussion a.Discuss your procedure with the data you collected. 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