Laboratory Techniques & Measurements Essay

Laboratory Techniques & Measurements Objectives: Become familiar with several important laboratory techniques. Gain proficiency with some of the common measuring devices used in a chemistry laboratory. Determine the volume, mass, length, temperature, and density of objects and liquids 1. Length Measurements: Object Length (cm) Length (mm) Pop Can 12.0 120.0 iPhone 11.7 117.0 TV Remote 16.3 163.0 2. Temperature Measurements: Hot water from tap (⠁ °C) –  47 Boiling Water (⠁ °C) –  61 Boiling Water after 5 mins.(⠁ °C) –  73 Cold water from tap (⠁ °C) –  15 Ice Water (⠁ °C) – 6 Ice Water after 5 mins. (⠁ °C) – 4 3. Volume Measurements: Test tube volume (mL) – 10 Number of drops in 1 mL – 9 Pipet volume (mL) – 4 4. Mass Measurements: Object Estimated Mass (g) –  7.8 Actual Mass (g) –  9.2 5. Density Measurements: Mass A Mass B Mass A-B Object Graduated Cylinder + Substance Hypothesis on Salt Compared to Water: The salt solution will have a greater density than pure water as the substance mass is lager. 6. Densities of Irregular Objects: Mass A Mass B Mass B-A Object Graduated Cylinder Volume (mL) Graduated Cylinder + Object (mL) Object Volume (mL) Object Mass (g) Density M/V Metal bolt Water Displacement Method Questions: A. Some reasons for the water not boiling at 100⠁ °C could be: different temperature settings, not allowing enough time to fully boil and experimental error. B. 102⠁ °C-100⠁ °C 99.2-100 100⠁ °C 100 2-0.8 100⠁ °C 100⠁ ° 0.02 X100%-0.008X100 =2=-0.8 C. Height= 3.6, Base=4.21, Width= 1.17 Volume = bXh/w 4.21X3.6/1.17 = 13.31 Density= mass/volume 21.3/13.31 = 1.6 D. Density= mass/volume 19.30=26.15/V -26.15X19.30=V -504.69=V V=504.69 Conclusion: Some new things that I learned from this lab are experimental errors can drastically effect the outcome and adding a substance such as salt to water will increase the density of water. I believe I did meet the lab objectives because in result of this lab I became familiar with lab techniques, gained experience using lab measuring devices and I learned the volume, mass, length temperature and density of some objects and liquids.