Experiment 9 Weak Acids and Buffers GRADING RUBRIC Student name: ______Meghan Lu____ Lab partner name: ____Angela Lui and Michelle Lee____ TA name: _____SangHyun Lee_____ Day & time of the lab: __5pm/wed__ The lab report packet for this experiment should consist of the following: 1.(15 pts)PRE-lab notebook pages 2.(10 pts)IN-lab & POST-lab notebook pages 2.1. Experimental procedure 2.2. Recorded experimental values and the file name (as saved on your USB drive) 2.3. Observations if any were noted 2.4. POST-lab notebook pages should be attached as appropriate; might contain, for example, detailed calculations, or anything written down after the lab was over. 3.(75 pts)The WORKSHEET 3.1. Tables with captions 3.2. Figures of graphs with captions in the right positions 3.3. Detailed calculations (may be hand-written in the POST lab notebook pages; clearly refer to these while answering the worksheet 3.4. Complete (full sentence) answers to the discussion questions (DQ;may be listed by DQ#s) Complete this worksheet, print, and attach to your lab report packet.Feel free to adjust space in this document as needed.Submit the worksheet document online to Canvas AND in print to your TA.Print the summary of the similarity report (the last page in the “current view” file is enough) and attach to the lab report packet. NOTE about the FILE SIZE for electronic submissions:If your final document is too large and upon upload to Canvas you get the message that “your file is too big to upload” you can resolve that, for example, by: reducing the resolution of your graphics, saving the document as a text (.docx) file instead of a .pdf file, etc. 1 A. M. BohnsackSpring 2019 (revised Z. Baranová)

Worksheet & Grading Rubric – Weak Acids and Buffers PRE-LAB notebook pages –15 pts– point breakdown 1.(2 pts)Purpose: 2.(2 pts)Objectives: 3.(2 pts)List of compounds (reactants, reagents, solvents, etc.with the correct concentrations) 4.(1 pts)List of equipment 5.(2 pts)Chemical and physical hazards 6.(4 pts)Properly balanced chemical equations (2 sets: formula unit, total and net ionic) 7.(2 pts)ExperimentalOUTLINE IN-LAB & POST-LAB –10 pts Students have been instructed to record everything – procedure, unknown number, observations, results, sample calculations, etc. If you notice something missing, deduct points, and remember to be fair and consistent. 1.complete experimental procedure 2.detailed observations 3.mention of the electronic files (three parts, multiple trials) 4.one detailed example for every type of calculations 2 A. M. BohnsackSpring 2019 (revised Z. Baranová)

Worksheet & Grading Rubric – Weak Acids and Buffers RESULTS & DISCUSSION QUESTIONS –75 pts (10 pts)Include any/all relevant figures (titration curves and second derivative curves). Include appropriate captions. Figure 1:The graph above shows the second derivative of the titration of acetic acid with NaOH Trial 1. The point at which the line crosses the x-axis is the equivalence point.