Potassium permanganate (0.05 or 0.1M)REDOX Titration Analysis of OxalateCHEM 30AL FALL 2002 Experiment #11: Analysis of Iron oxalate (PART 2) REDOX Titration Analysis of Iron Oxalate Complex Pre-lab Report Guidelines for Iron Oxalate Experiment (period 2 ONLY) (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) Prelab 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 one mole of EDTA. The 6 "bond" that mentioned in the manual are NOT physical bonds. They are strong electrostatic attractions form by the nitrogens and oxygens with the metal ion on EDTA (similar to the diagram for the hydration Fe3+ in water on the lecture guide). (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 FALL 2002 Experiment #11: Analysis of Iron oxalate (PART 2) Post-lab Report Guidelines for Iron Oxalate Experiment (Part 2) REDOX Titration Analysis of Oxalate 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 each part of the report) (B) Titration Data (see p.103 under Analyses) (i) Orderly record (i.e. recopy) of the 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 in each of your titrations, based on the stoichiometry of equation 3, p. 98 (ii) Calculate the moles of oxalate/gram of product for each 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. (ii) Calculate the % RAD (refer to page 22-25 for definitions) for the moles of oxalate/gram of sample that you obtained from the 3 trials. Note: If no % error was given on bottle of the potassium permanganate solution, you may assume the % RELATIVE error in the stock potassium permanganate solution to be± 1% (E) Conclusions (i) Summarize results (ii) Compare % RAD with the % inherent error. What can you conclude?
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