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University of Cincinnati, Main Campus CHEM 111 Chem21Labs exp 1

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University of Cincinnati, Main Campus CHEM 111 Chem21Labs exp 1 Chem21Labs http://www3.chem21labs.com/student2/?mode=assign&assignment=181 1/10 About Chem21Labs | Home | Contact Us | Referenc... e Material | Logout Vamsidhar Student Area Vamsidhar is currently logged in. This assignment is due at 11:45 PM on 09/15/2015. Any work submitted between that time and 11:45 PM on 09/16/2015 will result in an automatic 10 point deduction. Also, any work submitted between 11:45 PM on 09/16/2015 and 11:45 PM on 09/17/2015 will result in an additional 10 points being deducted for the assignment. ­ PDF Lab Guide Due date passed. Please check with your Instructor or TA to submit lab work. Online Lab Submission Complete. Check back several days after the due date to view points added by your instructor. Experiment 1 Report Sheet TOOLS FOR LAB MEASUREMENTS Important! Read the Chem21 instructions on Blackboard before proceeding! Total Points = 124.75 150 Introduction Note: All essay answers throughout the semester must be composed in the html text editor below. If you copy / paste from another source, you may accidentally insert code that will make your lab sheet display improperly for your TA / Instructor (alerting them that the information was copied from some source). If you need to copy / paste from WORD, first copy / paste into a program like NotePad and then copy paste into the text area below. 5 10 In any science report collecting accurate data is one of the most important features of the report; this feature helps prove hypothesises formulated, and helps show correlation if there is any. In this lab the measuring scales were used to weigh objects, the measure net system was used to graph data such as time vs temperature in this lab. Through this experiment the importance of several trials was seen, also the importace of letting numbers stabalize was seen. Through the experiment the diffrences between measured and calculated data was seen; including the diffrences in precision and accuracy of diffrent glass wares. [The true objective was becoming familiar with the measurenet system, also more details on how the objective will be met, ex. temp vs time graph. Concepts from lecture? Lab techniques?] 10/11/2015 Chem21Labs http://www3.chem21labs.com/student2/?mode=assign&assignment=181 2/10 Experimental Procedure 4.5 5 Procedure given in Experiment 1 pages 4 to 10 were followed. [Where did you find it?] Temperature Probe Calibration Ice-and-water bath temperature prior to probe calibration ­.54 oC Ice-and-water bath temperature after probe calibration ­.55 oC Instructor Assigned Grade Based On Temperature Probe Calibration 0.5 3 View Comment Mass Measurements - Analytical Balance Trial 1 Trial 2 Difference (report as positive value) Mass of Evaporating Dish 91.402 g 91.405 g .003 .003 2 2 g Mass of Microspatula 8.255 g 8.258 g .003 .003 2 2 g Calculated Mass of Dish + Spatula 99.657 99.657 2 2 g 99.663 99.663 2 2 g .006 .006 2 2 g 10/11/2015 Chem21Lab [Show More]

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