Copy of Lab Report Week 2

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Arizona State University *

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MISC

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Chemistry

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Feb 20, 2024

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pdf

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8

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Investigation 2: How is Glassware Used?
Introduction: This experiment was conducted to test the density of water in a variety of glassware. Density is the relationship between the mass of a substance and how much space it takes up. Water is a polar inorganic compound with a density of 1 g/cm^3. The first part of this experiment was measuring the density of water in a 50 milliliter beaker. Two trials were conducted with a 125 milliliter erlenmeyer flask, 100 milliliter beaker, and a 10 milliliter graduated cylinder in addition to the initial 50 milliliter beaker. The group predicted that when the mass of the water was calculated, the density could then be found. This experiment is important because accurately measuring the mass of a substance in a variety of glassware is crucial when conducting labs that require the precise measurement of liquid.
Procedure/Experiment: The first experiment was to test the density of water. The temperature was recorded to reference what the actual density of water is at certain temperatures. Two separate trials were performed, in different glasswares with different means of measurement. The first experiment was conducted in a 50 milliliter beaker. The dry mass of the beaker must be first known, then the volume of the water was measured to the appropriate significant figures. Next, the mass of the beaker including the water was recorded, which was then subtracted from the dry mass of the beaker, resulting with only the mass of the water. The mass of the water was then divided by the volume of the water concluding the experimental density of the water. The trial was then repeated in order to accumulate an average density. The second experiment was conducted in a 125 milliliter erlenmeyer flask, the third with a 100 milliliter beaker, instead of the 50 milliliter buret, and lastly the fourth experiment was with a 10 milliliter graduated cylinder. In order to minimize errors, the exact same experiment was conducted on all glassware. A percentage of error was calculated in order to evaluate errors throughout the experiments. Due to time constraints, the experiment consisting of massing a gram of sand was unable to be performed.
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