CHEM14BL Winter 2004 Report Guideline for Experiment 3 Vinegar Titration Week 2 You MUST turn in the pre lab at the beginning of your lab section Pre lab report must be written inside the lab notebook Pre lab Guideline Week 2 i Title ii Reference of procedures iii Introduction iv Procedures flowchart under week 2 v MSDS information refer to the MSDS handouts for details HCl 0 5M Note In MSDS select the site that gives you the MSDS information closest to the concentration listed above for each individual chemical You may have to convert the concentration units on MSDS before you decide which site to use since sometimes the unit may be reported as w v on MSDS 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 b c d e f Product Name Chemical Formula Formula Weight Melting Point Boiling Point and Density Health Hazard Data summarize in your own words Spill and Disposal procedures summarize in your own words vi Complete the following pre lab study questions see page 44 Must show all work for FULL credit Note for this pre lab the study questions include BOTH week 1 and week 2 You may need to REVIEW the acid base materials from chemistry 14A BEFORE working on the following questions Also read the lecture guides on acid base equilibrium before attempting to solve the following questions Under WEEK 1 answer question 3 ONLY Note you don t need to answer question 2 in order to do question 3 Under WEEK 2 answer Questions 2 3 ONLY vii Data observations Use a NEW page for this Set up tables but leave blank CHEM14BL Winter 2004 Report Guideline for Experiment 3 Vinegar Titration Week 2 Post lab report must be written inside your notebook with the exception of graphs Refer to the lab schedule for post lab reports due date This is a GROUP report i e turn in ONE report per group Post lab Guideline Week 2 I Write the names of your group members and their responsibility in the experiment and in writing this post lab report II Data printouts of data tables from EXCEL are acceptable Organize data into tables and label each data table clearly with title Your data table should include all the raw data as well as all the calculated values for the derivative graphs III Graphs Use EXCEL to plot the titration graphs There should be a total of FOUR graphs Prepare a full titration graph AND a first derivative graph for the combined buffer titrations for 5 ml aliquots of vinegar with HCl and NaOH Prepare a full titration graph AND a first derivative graph for the combined buffer titrations for 10 ml aliquots of vinegar with HCl and NaOH Your graphs should have correct scales and full use of graph paper axes Labeled with units appropriate titles and labels Make sure you put EACH GRAPH ON A SEPARATE PIECE OF PAPER CHECK THE GRIDLINES for appropriate scaling CHEM14BL Winter 2004 Report Guideline for Experiment 3 Vinegar Titration Week 2 Post lab report must be written inside your notebook with the exception of graphs Refer to the lab schedule for post lab reports due date IV Analysis Determine the points on the combined buffer graphs that correspond to the limits of the buffer region see buffer graphs in lecture guide Using the value for the pKa determined from week 1 and the pH of the solution at that point of the titration calculate the ratio of OAc HOAc at these points Henderson Hasselbach equation can be used in this region Complete all questions in the Discussion Application sections skip the Evaluation section Hint For acid rain chemistry read the appropriate chapter on acid rain in your general chemistry textbook V Conclusion summarize all the results comment on the buffer limits between the two sets of buffer i e 5ml and 10ml What can you conclude Explain
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