Intro to Organic Lab Report

Anonymous
timer Asked: Jan 17th, 2019
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Question Description

I included all my lab notebook pages and data, templates we have to follow!

Follow template:

  • Delete the blue guidance text from the template and use black text for all of your content
  • Word and Page Limits - Word and page limits are in the templates. Just because there is 2 page or 300 word limit does not mean you need 2 pages or 300 words. It's a limit, not a requirement. Some post-labs can be written up in 2, most will take ~3 pages. Do not play silly font or margin games to make 4 pages. Work on identifying the key points of each experiments so that you can be precise and brief in your writing.* Points will be deducted for shot-gun answers
  • Fonts- Arial/Helvetica - size 10 or 11 is preferred. Times New Roman must be size 12. Other fonts are frowned upon.
  • Post-labs and Reports will be graded and evaluated for originality and plagiarism using Turnitin.com.
  • DO NOT FORGET TO INCLUDE YOUR UNKNOWN COMPOUND ID #. Without this ID number we cannot know if your identification is correct
  • All chemical structures or equations must be done chemdraw or equivalent drawing program.
  • Use the equation editor for any required calculations!

Intro to Organic Lab Report
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Intro to Organic Lab Report
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Intro to Organic Lab Report
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Experiment 0 Post-lab Melting Point Determination W19 CHEM 43A Name________________________ Page Limit 2 pages Part A Pipette Techniques Objective (1-2 sentences) State the objective of the experiment. (what?) Motivation (1-2 sentences) State why the experimental techniques or results are important. (why?) Scientific Reasoning (Answer in 1-2 sentences each) Understand - Graduated cylinders and pipettes are not particularly accurate nor are your measurements precise. Explain how this affects the reliability of your data (i.e. the observed density of water)? Critical Analysis - Why do organic chemists weigh liquid reagents when accuracy is important? Experimental Summary Briefly (~100 words or less) summarize the objective of the experiment, the method you used to accomplish the objective, and your results. Make sure you include the only the key experimental data that directly supports the outcome of your experiment. Part B Melting Point Determination of an Unknown Unknown ID#______________ Objective (1-2 sentences) State the objective of the experiment. (what?) Motivation (1-2 sentences) State why the experimental techniques or results are important. (why?) ID#, Name and Structure of Unknown: Scientific Reasoning (Answer in 1-2 sentences each) Understand - Explain how melting points are used to identify compounds and determine purity. Apply - If a melting point is an identifying characteristic of a compounds, why do organic chemists used mixed melting points? Experimental Summary ©2019 Jeremy K. Klosterman. Do not copy or distribute without permission. Experiment 0 Post-lab Melting Point Determination W19 CHEM 43A Briefly (~100 words or less) summarize the objective of the experiment, the method you used to accomplish the objective, and your results. Make sure you include the only the key experimental data that directly supports the outcome of your experiment. ©2019 Jeremy K. Klosterman. Do not copy or distribute without permission.
Experiment 0 Data Report Melting Point Determination W19 CHEM 43A Name________________________ Transfer from your notebook the measurements (along with the appropriate units) you made to the tables below. Remember to write out the units and use the correct significant figures associated with the accuracy of each measurement. Also indicate the error or precision of each measurement. Part A -Pipette Techniques Table 1. Glass Pasteur pipette Value Units Error1 Units Error1 Water Temperature Drops of water in 1mL Mass of water in 1mL Calculations Use the correct units and sig. figs. Actual Volume of Water2 Average mass of one drop of water Average volume of a drop of water Table 2. Plastic Pasteur pipette Value Water Temperature Drops of water in 1mL Mass of water in 1mL Calculations - Use the correct units and sig. figs. Actual Volume of Water Average mass of one drop of water Average volume of a drop of water Table 3. Glass Pasteur pipette - Class Average Class Average Water Temperature Drops of water in 1mL Mass of water in 1mL Standard Deviation3 See pages 64-72 in Mohrig 4ed. Look up the density of water in the CRC and use the observed mass to calculate the volume - mind your accuracy (sig. figs) 3 See pages 70 in Mohrig 4ed. 1 2 ©2019 Jeremy K. Klosterman. Do not copy or distribute without permission. Experiment 0 Data Report Melting Point Determination W19 CHEM 43A Part C - Melting Point Determination of an Unknown Unknown ID# Table 3. Melting Point Determination of Unknown # Crude mp range Careful mp range #1 Careful mp range #2 Careful mp range #3 if needed Average mp range4 Average mp midpoint5 Calculations Potential unknown identity - Write out the names of possible matches for your unknown. Part D - Melting Point Determination of a Standard Table 4. Melting Point Determination of a Standard MP Standard Reported mp: Observed mp range Correction Factor6 Corrected mp range of unknown Part E - Melting Point Determination of a Mixture Table 5. Melting Point Determination of mixture (Unknown # & known compounds) Known compound Mixed mp range Unknown + Unknown + Unknown + ID#, Name and Structure of Unknown 4 Average the high and low values from the observed mp ranges. Average the midpoint values from the observed mp ranges. 6 The difference between the observed melting range midpoint and the reported mp range midpoint. 5 ©2019 Jeremy K. Klosterman. Do not copy or distribute without permission.

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School: Cornell University

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