Show work please Trial 3 Trial 1 Trial 2 Mass Jar (g) Number of drops of unknown

Question

Show work please Trial 3 Trial 1 Trial 2 Mass Jar (g) Number of drops of unknown added to jar Initial Volume in Buret Final Volume in Buret Mass Jar after unknown 33. C2C 31.12 g 23.220 added Volume unknown 1.2 5 ML ML delivered to jar Mass unknown delivered to jar Density unknown Average Density unknown Before answering questions for Part 5, use Part 4 to save the experiment file and Lab journal before the end of the class period. The questions for Part 5 may be answered outside of class if necessary. Part 5 Questions: 1. Based on the data collected, determine the density of the unknown liquid for each of the three trials, and determine the average density from these three trials, Make sure to show the calculations performed in each case, and be sure to include the correct units and significant The terms precision and accuracy can be used to describe data collected in a laboratory. To determine whether the data obtained is precise or accurate, different mathematical processes must be done. 2. Precision is a measure of how close together the data points collected are to each other. Therefore, by definition, in order to determine precision, more than one dato point must be collected. Can precision be determined with the data collected in Part 4? 3. To calculate precision, several calculations must be done. Recopy data from Data Table 1 into Data Table 2, and fill in the rest of the table to determine the precision of the data collected. Make sure to show all the calculations required to complete the table.

Explanation / Answer

2) Mass of jar= 29.962 gms

Mass of unknown with jar= 34.216gm

Mass unknown= 34.216-29.962=4.254 gms

Initial volume of buret= 28ml, final volume of buret= 23ml

Change in volume= 28-23= 5ml

Density = mass/volume= 4.254/5 g/ml=0.8508 g/ml

3) Mass of jar= 30.28 gms

Mass of unknown with jar= 38.22 gm

Mass unknown= 38.22-30.28=7.94 gms

Initial volume of buret= 35ml, final volume of buret= 33.8

Change in volume= 35-33.8= 1.2 ml

Density = mass/volume =7.94/1.2=6.61 g/cc

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