The precision of a 50 ml glass, 25 ml strength. cylinder. and a 25 ml pipette were determined by transferring each type to a 50 ml volumetric beaker. The density of copper was determined by volume displacement in water. The pipette was the most precise with an average volume of 24.843±0.184 ml. While the 25 ml cylinder had a volume of 24.601±0.708 ml and the 50 ml beaker had a volume of 24.074±1.98 ml. The density of copper was found to be 9.190±0.836, with an accuracy of 2.567%. The difference in density measurements may be due to human error or temperature differences. Context: Previously presented on D2l. Procedure: Hirko, R. Chemistry 112L General Chemistry I Laboratory, Ninth Edition; blue door: Minneapolis, 2015; Experiment 1.Results: Jar T/°C H2) Mass/g Density/ g/cc V/ mL 50 mL beaker 21.1° 23.454 0.99797 23.50250 mL beaker 21.1° 24.935 0.99796 24 .98650 mL glass 21.1° 23.687 0.99797 23.735 Average volume 24.074 Uncertainty 1.9825 mL grad. Cyl. 20.7° 24.806 0.99799 24.29225 mL grad. Cyl. 20.9° 24.268 0.99804 24.85425 mL grad. Cyl. 20.8° 24.609 0.99802 24.657 Average volume 24.601 Uncertainty 0.70825 ml pipette 21.4° 24.837 0.99791 24.88925 ml pipette 21.3° 24.829 0.99789 24.88125 ml pipette 21. 3rd 24.706 0.99792 24.757 Average volume 24.843 Uncertainty 0.184 Test 1 Test 2 Test 3 Dry cylinder mass / g 27.250 27.337 27.260 Dry cylinder mass + metal / g 61.331 61.415 61.335 Dry cylinder mass + metal + water up to the 10.00 ml mark 67.961 67.487 67.410 Metal mass / g 34,081 34.078 34.075 Mass of water/ g 6.63 6.072 7.075 Volume of water/ cc 6.644 6.085 6.088 Volume of metal / cc 3.356 3.915 3.912 Density of metal / g/cc 10.155 8.704 8.71 Average density ± Uncertain...... half of the paper ... ...the error that may be present is inconsistent temperatures. In each of these tests the temperature was never measured to make sure the number was actually 21°C. This temperature discrepancy could lead to inaccuracies in the determination of the average density. More accurate measurements are needed to improve part 2 of this experiment. You need to spend more time to get an accurate water measurement up to the 10ml line. It is also necessary to measure the temperature before each test to accurately calculate the average density for each test. Adding a test with a liquid other than water would require changes in the numbers used to calculate the density of the metal, but could provide additional data to confirm the density found. Acknowledgments: I would like to thank my lab partner Chad White for assistance in the experiment, my TA Amos Dwamena, and my lab coordinator Mandy Orth.