Lab Report 1

Lab Report 1 - Water, 25 mL 5.0038 5.0128 Acetone, 5 mL...

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Experiment #1 – Conservation Laws Ryan Henry Section 523 Lab Partner: Charlotte McCoy The purpose of this experiment was to explore the question of whether or not mass and volume are conserved when two substances are mixed. Also, this experiment was to serve as an introduction to techniques that will be used throughout this course and an opportunity to think about experimental procedures and measurement errors. This experiment involved two substances: Water [H2O] and Acetone [OC(CH3)2]. For the first part of the experiment, we added 5 mL of water to a beaker and measured the weight until we reached 25 mL. We did the same thing for Acetone. In the second part of the experiment, we did 3 different mixtures involving water and acetone, then measured the mass and volume for each. We find out in this experiment that mass and volume are both conserved. Substance Mass (g) Volume (mL) Water, 5 mL 7.6057 7.6194 Water, 10 mL 2.3838 2.3881 Water, 15 mL 4.9784 4.9874 Water, 20 mL 4.9865 4.9955
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Unformatted text preview: Water, 25 mL 5.0038 5.0128 Acetone, 5 mL 3.0697 3.0752 Acetone, 10 mL 4.4677 4.4758 Acetone, 15 mL 3.8800 3.8870 Acetone, 20 mL 3.8745 3.8815 Acetone, 25 mL 3.8858 3.8928 Vpipette, avg = 5.0006 mL Density of Acetone = 0.7670 g/mL Mixture Mass (g) Volume (mL) Water (5 mL), then Water (5 mL) 10.0786 10.1 mL Water (5 mL), then Acetone (5 mL) 8.9931 10.0 mL Acetone (5 mL), then Water (5 mL) 9.0588 10.5 mL Calculations: I did 5 different kinds of calculations for this experiment: 1) mass, substance = (mass with substance added) (previous mass) m of 5mL, water = 57.0753 - 49.4696 = 7.6057g 2) Volume = mass/density V of 5mL, water = 7.6057 / 0.9982 = 7.6194mL 3) Volume, average = (V1 + V2. .. + V5) /5 Vpipette, avg = (7.6194+2.3881+4.9874+4.9955+5.0128)/5 = 5.0006mL 4) Deviation = Vpipette Vpipette, avg Deviation of V of 5mL from avg = 7.6194 5.0006 = 2.6188 5) Density = mass/volume Density of acetone = 3.8355 / 5.0006 = 0.7670 g/mL...
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This note was uploaded on 09/12/2011 for the course CHEM 117 taught by Professor Brown during the Spring '09 term at Texas A&M.

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Lab Report 1 - Water, 25 mL 5.0038 5.0128 Acetone, 5 mL...

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