CHEM 151 SD1 In-Lab Worksheet v2.1 | 1Skills Development 1In-Lab WorksheetYour TA’s name: Chris Zerio Your name: Amandip SinghLab section: 001 J Your email: [email protected] ____ /5 p + WS ____ /20 p = GRADE ____ /25 pAll work must be well-written and organized. If your penmanship is poor, you must type all responses. If you need to organize your thoughts,please use a separate sheet of paper. A major objective of this lab course is to develop skills in scientific communication. Just having the right“answer” is not good enough – you must communicate clearly and succinctly and use terms and concepts correctly.1. Volume and Mass Data Table (4 p) Construct a data table of the volume and mass values that you personally collected. That is, for themicropipette volume additions and corresponding masses that you recorded, build a table. The table must be well organized, appropriatelytitled, have proper column headings, and have the correct sig figs and units for all numerical entries. In this exercise you are developing skills inorganizing and presenting tabular data. This is an important skill for all future lab work.Water Density Volume vs MassV (mL) M(g)0.500 mL 0.499 g1.00 mL 0.998 g1.500 mL 1.497 g2.00 mL 1.994 g2.500 mL 2.51 g3.00 mL 3.01 g2. Determining Density Graphically (4 p) Using Excel, prepare a mass versus volume plot for the run you performed. Properly title the plotand label the axes correctly. Include the equation of the linear trend-line (from Excel). The slope of this line is the density of water asdetermined by you and your technique. Paste in the complete plot below, or if working on hardcopy, carefully draw the complete plot below.Remember, use the correct sig figs and units on all values. You will likely need to adjust the sig figs for the equation of the linear trend-line inExcel. In this activity you are being guided towards the correct presentation of graphical information for this lab course and most scientificdocuments.0 0.5 1 1.5 2 2.5 3 3.500.511.522.533.5f(x) = 1.01x − 0.01water density Volume vs MassVolume (mL)Mass (g)SD1 In-Lab v2.1 MY © 2017 8-15-17 Chem Think Technical Press CBC UofACHEM 151 SD1 In-Lab Worksheet v2.1 | 23. Analysis of Precision (4 p) All of the following must be in full well-written sentences. Now consider your mass versus volume plot. What does this say about your precision?The graph tells us that we got precise data, because all the points line up on the slope of the graph. That represents our experimental value for the density of the water tested. In other words, for each volume measured we got a corresponding mass which had a similar ratio of m/g. 4. Percent Error Calculation (4 p) The density of pure water at room temperature (20 oC) is 0.9982 g/mL. Given this and your result determinethe percent error. To do this, first symbolically (with mathematical symbols, not actual values or words) state the equation you used to calculatethe percent error. Define all variables. Next, give an example calculation in which actual values are plugged in and the results shown. Be certainall sig figs and units are correct. In this exercise you are learning how to present calculations in a form appropriate to a scientific document. Youare expected to follow this format in all subsequent lab work without being prompted.pTheoretical= 0.9982 g/mL pexperimental= 1.005 g/mLE= ((pe-pt)/pt )*100E= percent error pe= density experimental pt= density theoretical E= ((1.005 g/mL – 0.9982 g/mL)/0.9982 g/mL) *100E= .6812%5. Analysis of Accuracy (4) All of the following must be in full well-written sentences. Evaluate the accuracy of your micropipette technique.Start by stating the density for water you obtained and the accepted or “true” value. Next state the calculated percent error. What does this sayabout your accuracy?In the experimentation we found the density of water to be 1.005 g/mL, while the theoretical (or true)value is 0.9982 g/mL. We had a 0.6812% difference in value. Since it was a small percent error provesthat our findings were very accurate, due to the fact that we were under a 5% error margin.SD1 In-Lab v2.1 MY © 2017 8-15-17 Chem Think Technical Press CBC