Experiment 1
Density
By
Jessica Schmidt
Chem 112L-S23- Athukoralage Gunawardana
September 20, 2016
Erin Whitehouse
The first part of the experiment consisted of finding the accuracy and precision of three different measuring devices, a 50mL beaker, a 25mL graduated cylinder and a 25mL pipette. The mean volumes and uncertainties were found to be 22.5mL 1.9, 23.72 .25, and 24.89 .43, respectfully. The 25mL pipette was found to be the most accurate out of the three. The density of water was found to be 0.9979 g/cc with a percent error of .08, while the known density of water being 0.997041 g/cc. For the second experiment, the mean found density of copper was 8.7g/cc .22 and the known density for copper is 8.92 g/cc with a percent …show more content…
25mL of water was measured out using a 50mL beaker, a 25mL graduated cylinder and a 25mL pipette. The temperature of the water was recorded then the water was poured into a different beaker to be placed on the scale and its mass recorded. This process was repeated three times for each container type. For the second part of the experiment, a dry graduated cylinder was weighed, then copper pellets was added and together were weighed and their masses recorded. The cylinder containing the metal was then filled with water and the mass was taken again. These measurements were then used to find the individual masses and volumes of the water and …show more content…
The beaker was found to be both the least accurate, the least precise and had the largest uncertainty of the three measuring devices with an accuracy of 89.96, a precision of 8.44 and a percent error of 10.04 1.9. The graduated cylinder was the second most accurate and precise with its accuracy of 94.88, a precision of 1.05 and a percent error of 5.12. The 25mL pipette was found to be the most accurate and precise measuring device with an accuracy of 99.56, a precision of 1.72 and a percent error of
Density
By
Jessica Schmidt
Chem 112L-S23- Athukoralage Gunawardana
September 20, 2016
Erin Whitehouse
The first part of the experiment consisted of finding the accuracy and precision of three different measuring devices, a 50mL beaker, a 25mL graduated cylinder and a 25mL pipette. The mean volumes and uncertainties were found to be 22.5mL 1.9, 23.72 .25, and 24.89 .43, respectfully. The 25mL pipette was found to be the most accurate out of the three. The density of water was found to be 0.9979 g/cc with a percent error of .08, while the known density of water being 0.997041 g/cc. For the second experiment, the mean found density of copper was 8.7g/cc .22 and the known density for copper is 8.92 g/cc with a percent …show more content…
25mL of water was measured out using a 50mL beaker, a 25mL graduated cylinder and a 25mL pipette. The temperature of the water was recorded then the water was poured into a different beaker to be placed on the scale and its mass recorded. This process was repeated three times for each container type. For the second part of the experiment, a dry graduated cylinder was weighed, then copper pellets was added and together were weighed and their masses recorded. The cylinder containing the metal was then filled with water and the mass was taken again. These measurements were then used to find the individual masses and volumes of the water and …show more content…
The beaker was found to be both the least accurate, the least precise and had the largest uncertainty of the three measuring devices with an accuracy of 89.96, a precision of 8.44 and a percent error of 10.04 1.9. The graduated cylinder was the second most accurate and precise with its accuracy of 94.88, a precision of 1.05 and a percent error of 5.12. The 25mL pipette was found to be the most accurate and precise measuring device with an accuracy of 99.56, a precision of 1.72 and a percent error of