How is Lab Glassware Used Final - How is Lab Glassware Used...

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How is Lab Glassware Used? Lab 2 Group 2: Ashley Mahoney, Imani Tyson, Iman Almajhad, Aaron Gavini Donell Schmacht L51, Friday 10:30 a.m. - 12:20 p.m. 9 September 2016
Introduction : Beakers, Erlenmeyer flasks, burets, volumetric flasks, and graduated cylinders are the laboratory glassware that will be used in this experiment. Types of volumetric glassware include the burets, volumetric flask, graduated cylinder, and volumetric pipette; all of their measurements are in units of millimeters. Glassware used to hold the volume of the water include the Erlenmeyer flask and beaker. The purpose of this experiment is to find the most precise and accurate glassware by comparing the density of water (the mass of water per millimeter; D = m v ¿ measured within the glassware to the already known density of water being 0.9976575 g/mL. In order to determine which glassware is the most precise and/or accurate, the average lowest percent error (the difference between the experimental value and the known value divided by the known value) has to be known. The average lowest percent is the result of the glassware that gives the most accurate (how close a measured value is to the actual value) and the most precise (the repetition of measurements under unchanged conditions and shows the same results) measurements. Procedure: For this experiment the materials used were a 50 mL beaker, 125 mL Erlenmeyer flask, 50 mL buret, 10 mL graduated cylinder, thermometer, plastic pipette, weighing boat, goggles, distilled water and an electronic balance. First you had needed to determine how many trials you were going to do. Three seemed like a good amount to get an accurate average between each different glassware. First was to set up a table to record all the data. The second step was to mass an empty dry 50mL beaker and a 125mL beaker using the same electronic balance. Next was
determined whether a 50mL buret was accurate and precise. First set up the buret using a ring stand and clamps to add distilled water to it. Next mass an empty 100mL beaker following the

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