Chem Lab – Density
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Experiment 1: Density February 8th 2016 Professor Dr. Stanley Monday 12:00-2:50p Introduction: Density is most often described as mass per volume of a substance. Mathematically, it can be written as; d=m/v The purpose of this experiment is to determine the density of an unknown metal in Part A, and also to determine the density of a water/ethanol mixture in Part B. In order to acquire my results, the approach I used involved following the proper instructions given. In order for my findings to be precise I meticulously recorded exact measurements. Data & Results: Part A: Density of unknown metal After 1st addition of metalAfter 2nd addition of metalAfter 3rd addition of metalAfter 4th addition of metalVolume of water plus metal36.0mL38.0mL40.0mL42.0mLVolume volume of water in cylinder prior to addition of first metal portion*35.0mL35.0mL35.0mL35.0mLVolume of metal1.0mL3.0mL5.0mL7.0mLMass of cylinder, water and metal118.02g123.46g132.93g142.95gInitial mass of cylinder plus water prior to addition of first metal portion#108.94g108.94g108.94g108.94gMass of metal 9.06g15.52g26.99g38.06gDensity: Determined by slope the line = 5.60Unknown metal: Mossy TinPart B: Density of water/ethanol mixture Unknown #5Mass of Erlenmeyer + solution (g) 131.671 140.105 152.43 168.121 177.711Mass of Erlenmeyer (g) 113.184 131.671 140.105 152.428 168.121 Mass of solution (g) 17.83 8.435 12.32 15.69 9.589
Final buret reading(mL) 42.61 19.60 32.52 49.60 34.00Initial buret reading (mL) 23.6 10.0 12.5 23.6 17.5Volume of Solution (mL) 19.0 9.40 20.0 26.0 16.5Temperature (Degrees C) 20.0 20.0 20.0 20.0 20.0 Density (m/V) .9384 .8973 .6161 .6035 .5811Deviation from mean Density Absolute DeviationTrial 1 .9384 .21112Trial 2 .8973 .17002Trial 3 .6161 .11118Trial 4 .6035 .12378Trial 5 .5811 .14618