Laboratory Techniques and Measurements Essay

968 WordsNov 20, 20124 Pages
Laboratory Techniques and Measurements Peter Jeschofnig, Ph.D. Version 42-0165-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Data Table 1: Length measurements. | Object | Length (cm) | Length (mm) | Length (m) | CD or DVD | 12cm | 120mm | .12m | Key | 6.5cm | 65mm | .065m | Spoon…show more content…
| Object | Mass(g) | Initial volume of graduated cylinder (mL) | Final volume of graduated cylinder (mL) | Object Volume (mL) | Density(g/mL) | Magnet | 4.4g | 7.0mL | 8.0mL | 1mL | 4.4g/cm^3 | Metal bolt | 8g | 7.0mL | 8.5mL | 1.5mL | 5.33g/cm^3 | Data Table 7: Archimedes’ Method. | Object | Mass(g) | Mass of Displaced Water (g) | Volume of Displaced Water (mL) | Density(g/mL) | Metal Bolt | 4.4g | 11.5g | 8.0mL | 4.4g/cm^3 | Magnet | 8.0g | 12.1g | 8.5mL | 5.33g/cm^3 | Data Table 8: Initial Concentration. | Chemical | Mass(g) | Molecular Weight (g) | Moles in Volumetric Flask | Total Volume (L) | Molarity(mol/L) | Sugar(C12H22O11) | 8g | 331.296g | 0.0241mol | .025L | .0964mol/L | Data Table 9: Dilution Series. | Dilution | Volume(mL) | Mass (g) | Density(g/mL) | Initial Concentration (M) | Volume Transferred (mL) | Final Concentration (M) | 0 | 25 mL | | | | 0 mL | | 1 | 25 mL | | | | 2.5 mL | | 2 | 25 mL | | | | 4.5 mL | | 3 | 25 mL | | | | 3 mL | | 4 | 25 mL | | | | 6 mL | | Chart Table 1. Molarity vs. Density Questions A. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason? One possibility could be the elevation. Another could be that your water was contaminated/taken out of the tap. B. While heating two different
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