Accuracy And Precision Lab Report Discussion

The container was then tarred so the scale would only read the mass of the water. The smallest beaker was used to measure out 14 ml of water. Then, that waster was poured into the pre-weighed beaker and put on the scale.

Once the measurement was recorded the beakers were both cleaned and dried. This process was repeated two more times.

Second, a 100 ml graduated cylinder was used to measure out 14 ml of water. Then, that water was poured into the pre-weighed beaker and put on the scale. Once the measurement was recorded, the beaker and graduated cylinder were both cleaned and dried.

Essay Example on Precision Measurement Lab Report

This process was repeated two more times. Third, a 25 ml burette was used to measure out 14 ml of water. Then, that water was poured into the pre-weighed beaker and put on the scale. Once the measurement was recorded, the beaker and burette were both cleaned and dried. This process was repeated two more times. After recording the mass using three different volumetric devices, each with three trials, density was calculated for each volumetric device and trial. Then, the trials were averaged. This concluded that the burette was the most accurate measuring device.

Table 2: Densities of selected metals Discussion: Both experiments went as planned and had no complications or unexpected events that could have altered the results. The masses measured for the amount of water in each volumetric measuring device are above and indicate the most efficient, precise, and accurate way to measure water.

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Also above are the results indicating the unknown metal was in fact lead. The data was collected accurately given by the number of trials performed and with the knowledge of precision gained from part one of the experiment.

The results of the first part of the experiment were what I had personally expected. Noticed that the burette had smaller increments of measure and was easier to judge where 14 ml of water would actually fill up to in the volumetric measuring device than the beaker and graduated cylinder. The results of the second part of the experiment also ended without any unexpected data. Of course, the density measured by my lab partner and myself was not as precise as he table with given densities of selected metals, but we came very close to the true value.

In comparison to other classmates’ results we came to relatively similar conclusions in each experiment. To make the results of each experiment more valid though, I think there could have been more than three trials for each measurement or time where we could have discussed our results with various other classmates to compare and contrast results.