Project 1 in lab report

# Project 1 in lab report - Chemical Thinking P1 In-Lab...

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Chemical Thinking P1 In-Lab Report v1.1 | 1 Project 1 In-Lab Report All 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 . When typing, all sections must have a line spacing of 1.5 to give room for TA feedback (the document is set to this spacing). Calculations (8 p) Symbolically (with mathematical symbols, not actual values) state the equation you used to calculate the volume of the your known plastic samples from linear measurements. Define all variables and constants. Next, give one example calculation in which actual values are plugged in and the results shown. Be certain all sig figs and units are correct. In this exercise you are learning how to present calculations in a form appropriate to a scientific document. You are expected to follow this format in all subsequent lab work without being prompted. In the first part of the experiment I was working with small PETE cylinders. In order to properly find the volume of the cylinders the equation (V= πr 2 h) was used. For the experiment, using PETE cylinders would have been the constant and the height of the cylinders would have been the variable. However, a mistake was made and both PETE and PS cylinders were used in the experiment while trying to find the density. This was a mistake would later lead to incorrect information and density being displayed on the below graph. (V= πr 2 h) Where V= Volume, r= radium, and h= height. Volume=πR(9.55mm) 2 H(49.3mm) Volume= π(4496.28325) Volume=14125.49043/1000 Volume= 14.3cm 3 2 4 6 8 10 12 14 16 0 5 10 15 20 25 f(x) = 1.59x - 2.62 R² = 0.99 Project 1 Lab Volume (cm3) Mass (g) Determining Density Graphically (6 p) Sketch (or paste in from Excel) the mass versus volume plot for the plastic you worked with . Properly title the plot and label the axes correctly. Include the R 2 value and the equation of the line (both from Excel). Use the correct sig figs and units. In this activity you are being guided towards the correct presentation of graphical information for this lab course and most scientific documents.

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