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Expt5-PrelabQuiz
Course: CHEM 321, Fall 2009School: Los Angeles Southwest...
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______________________________________ NAME: Lab section: (circle) M Tu W Th Fr Chemistry 321, Experiment 5: Prelab for the Gran Plot Pre-lab reports determine a large part of your grade. 1) Background Questions a) What is the purpose of this experiment? What methods of determining a titration endpoint are compared? Explain. (5 pts) b) Name the indicator that is used in this experiment. What change in color...
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______________________________________ NAME: Lab section: (circle) M Tu W
Th
Fr
Chemistry 321, Experiment 5: Prelab for the Gran Plot
Pre-lab reports determine a large part of your grade. 1) Background Questions a) What is the purpose of this experiment? What methods of determining a titration endpoint are compared? Explain. (5 pts) b) Name the indicator that is used in this experiment. What change in color indicates that the titration reaction is complete? (5 pts) c) What is the purpose of a Gran plot? What is the Gran plot equation? What do the xand y-axes correspond to on a Gran plot? (5 pts) d) Sylvester Student weighed out 3.0005 g of KHP, transferred it into a 500-mL volumetric flask, and diluted the sample to volume deionized with water. He then pipetted 100 mL of this solution into a 250 ml beaker for a subsequent titration with 0.1009 M NaOH. Calculate the volume of NaOH (in mL) required for Sylvester to reach the theoretical end point (Ve). (10 pts) 2) List all chemicals used in this experiment. Find Material Safety Data Sheets (MSDS) for those chemicals and list the safety ratings, potential health effects, and first aid measures. Access the information at the following website: http://www.hazard.com/msds/. (5 pts) 3) List all tools used in this experiment (5 pts) 4) List all glassware used in this experiment (5 pts) 5) Write a brief summary of the procedure for this lab experiment. Use the reverse side for more room (10 pts)
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