10:40 AM Fri Mar 3Virtual Lab Expt. #3 Density and Specific Gravity3. Density of metal rounds (steel)The mass in gram of three metal round (steel) provided is measured one at a time anddata entered in Table 3, under column 2, Replications #1, #2, #3, respectively.Overflow-cup with a drain-nozzle is placed on a bench above the water sink and filledwith water until excess water flows out through the nozzle and levels off.After the excess water stops dripping out of the overflow-cup, an empty beaker isheld under the nozzle with one hand and the metal round, of which mass enteredin Rep #1, is gently dropped in the water with the other hand; the metal willdisplace a fraction of the water and water flows out through the nozzle into thebeaker.The content of the beaker is then poured into a small, graduated cylinder, and thevolume is measured in ml and data recorded under volume of metal column.The experiment described for Rep #1 is repeated in the same manner for metal rounds2, and 3, and data entered in Row 2 and 3, in the appropriate columns.AssignmentThe theoretical data generated following the above outlined procedure are givenTable 3 below. From the given data, calculate and enter the density for eachreplication, the mean density value, and the % error of the experiment, using thegiven formulae.The density (g/ml) of the metal is calculated for each replication by dividing the massof metal round (g) by the volume of metal (ml), and results entered in the lastcolumn.The mean density values are calculated by adding the three replications and dividingby 3.The error % as compared to the standard density of steel, which is 7.8g/ml, iscalculated using the formula given under density of water measurement.Table 3. Density of round metal (steel)Replicate Mass of metal(g)7095120#1#2#3Volume of metal(ml)9.513.516.0Mean (average)% ErrorDensitymass/volume(g/ml)

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The theoretical data generated following the above outlined procedure are given Table 3 below. From the given data, calculate and enter the density for each replication, the mean density value, and the % error of the experiment, using the given formulae. The density (g/ml) of the metal is calculated for each replication by dividing the mass of metal round (g) by the volume of metal (ml), and results entered in the last column. The mean density values are calculated by adding the three replications and dividing by 3. The error % as compared to the standard density of steel, which is 7.8g/ml, is calculated using the formula given under density of water measurement. Table 3. Density of round metal (steel) Replicate Mass of metal (g) 70 95 120 #1 #2 #3 Volume of metal (ml) 9.5 13.5 16.0 Mean (average) % Error Density mass/volume (g/ml)

The theoretical data generated following the above outlined procedure are given Table 3 below. From the given data, calculate and enter the density for each replication, the mean density value, and the % error of the experiment, using the given formulae. The density (g/ml) of the metal is calculated for each replication by dividing the mass of metal round (g) by the volume of metal (ml), and results entered in the last column. The mean density values are calculated by adding the three replications and dividing by 3. The error % as compared to the standard density of steel, which is 7.8g/ml, is calculated using the formula given under density of water measurement. Table 3. Density of round metal (steel) Replicate Mass of metal (g) 70 95 120 #1 #2 #3 Volume of metal (ml) 9.5 13.5 16.0 Mean (average) % Error Density mass/volume (g/ml)

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.17QAP

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