CHEM 30AL Summer 2004Pre-lab Report GuidelinesPotassium permanganate (0.05 or 0.1M)REDOX Titration Analysis of the Iron Oxalate ComplexREDOX Titration Analysis of the Iron Oxalate ComplexCHEM 30AL Summer 2004 Experiment #11: Analysis of Iron oxalate Complex (PART 2) REDOX Titration Analysis of Iron Oxalate Complex Pre-lab Report Guidelines (i) Title (ii) Reference of procedures (iii) Introduction - summarize the goal(s) for this part of the experiment as well as any techniques that you will be using in achieving such goal(s). (iv) Procedures (flow chart) ( see P. 101 under period 2 BUT NOT INCLUDING "Colorimetric Analysis of Iron". You will do the flow chart for the colorimetric analysis in PART 3 of the pre-lab) (v) MSDS information The following chemicals will require you to use the MSDS database on the Web (see Lecture Syllabus): Potassium permanganate (0.05 or 0.1M) Note: In MSDS, select the site that gives you the MSDS information CLOSEST to the concentration listed above for each individual chemical. You should record the following MSDS information in your notebook for the chemicals listed above. (Printouts directly from the Web pages will NOT be accepted!!) (a) Product Name (b) Chemical Formula (c) Formula Weight (d) Melting Point; Boiling Point and Density (e) Health Hazard Data (summarize in your own words) (f) Spill and Disposal procedures (summarize in your own words) (vi) Pre-lab study questions (Must show all work for FULL credit) Complete ONLY questions 1 and 2 under period 2 on p.99. For question 2, the hint is that one mole of metal ion combine with only one mole of EDTA. (vii) Data/observations (start a NEW page for this section) Set up tables but leave blank. You MUST record all the observations into your lab notebook during your lab sessions.CHEM 30AL Summer 2004 Experiment #11: Analysis of Iron Oxalate Complex (PART 2) REDOX Titration Analysis of the Iron Oxalate Complex Post-lab Report Guidelines This is an INDIVIDUAL report Refer to the post-lab due date listed on the lab schedule (A) Abstract (refer to PART 1 post-lab guideline on what to include in the abstract section of this part of the report) (B) Titration Data (see p.103 under Analyses) (i) Orderly record (i.e. recopy) of your own titration data (ii) Data tables should have proper titles/labels (C) Data Analysis (MUST SHOW ALL WORK FOR FULL CREDIT) (i) Calculate the moles of oxalate for each of your titrations, based on the stoichiometry of equation 3, p. 98 (ii) Calculate the moles of oxalate/gram of product for each of your titration (D) Error Analysis (MUST SHOW ALL WORK FOR FULL CREDIT) Absolute uncertainties for various laboratory equipment are listed on page 31 of your lab manual (i) Calculate the % inherent error for the moles of oxalate/ gram of sample for ONE of your titration trial. Note: Concepts on how to calculate %inherent error were discussed extensively in Chem 20L. (ii) Calculate the % RAD (refer to page 22-25 for definitions) for the moles of oxalate/gram of sample that you obtained from your own titration trials. Note: If there is no % relative error (or absolute error) given on the bottle of potassium permanganate solution, you may assume the % RELATIVE error in the stock potassium permanganate solution to be± 1%.CHEM 30AL Summer 2004 Experiment #11: Analysis of Iron oxalate (PART 2) Post-lab Report Guidelines for Iron Oxalate Experiment (Part 2) REDOX Titration Analysis of the Iron Oxalate Complex This is an INDIVIDUAL report Refer to the post-lab due date listed on the lab schedule (E) Conclusions (i) Summarize results (ii) Compare % RAD with the % inherent error. What can you conclude? Explain. (iii) Using the UV spectrum of the iron-oxalate complex, explain whether the maximum absorption occurs at the “expected”
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