CHEM 30AL SUMMER 2002 Experiment #15 Ion-Exchange Chromatography PRE-LAB GUIDELINE Pre-lab report must be written inside your lab notebook. Pre-lab Report Format (Must turn in at the beginning of the first experiment period): (I) TITLE Must appear on each page. (II) INTRODUCTION Brief. (No more than 1/2 page) (III) PROCEDURE - Flow chart for the ENTIRE experiment - reference (must include title of manual, edition, authors, pages) (IV) MSDS The following chemicals will require you to use the MSDS database on the Web (see Lecture Syllabus & the MSDS handout): NH3 or NH4OH (concentrated), KSCN, KNO2 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) (V) PRELAB STUDY QUESTION (page 127) Only complete question #2 Note: In the procedure for HCl, the concentration unit of "F" is the same as "M". (VI) DATA/OBSERVATIONS (Start a NEW page for the following sections) Refer to study question #1 (page 127) You must record ALL your observations into your notebook during the lab period.CHEM 30AL SUMMER 2002 Experiment #15 Ion-Exchange Chromatography POST-LAB GUIDELINE This is a GROUP REPORT (i.e. Turn in ONLY ONE report PER GROUP) (I) ABSTRACT - outline the goal(s) as well the lab techniques that you used in achieving such goal(s). Also. Summarize your experimental results. (II) DATA AND OBSERVATIONS Write down the names of all the members in the group. Write out the responsibility of each member both for the experiment and for the postlab report. Re-write all the observations into your post-lab. Record the details of analytical tests made on each eluate fraction. Write down the conclusion drawn from EACH test. Write balanced chemical equations for the analytical tests that you performed in the lab. Net overall reactions are acceptable. (III) CONCLUSION Summarize ALL results (again). Explain the elution order of the metal ions in your unknown. In other words, explain why you observed such an elution order in the experiment. Hint: part of the reasoning can be explained through the use ionic radii of various metal ions (from your general chemistry textbook) to reason out the elution
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