Purpose: The purpose of this experiment was to illustrate how to determine the density of a liquid and regulate volumetric glassware properly. To determine the mass of liquids using a scale, the density of water and (unknown) liquid D were weighed, inside of a volumetric flask. Once the mass was determined in grams, the density was easy to determine, by using the density equation. The second portion of this experiment was to calibrate a 10mL pipette. Once the density was determined for this section, the pipette volume could then be determined, regarding the amount. The data that was recorded in my lab notebook, from these five trials could determine the pipets calibration. I believe that the meaning behind this experiment was to carefully
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The density for water was 0.989g/mL and the density for the Unknown Liquid was 0.998 g/mL,.
Table 4: Volumetric Data Table for the Volumetric Pipette. Trial Mass of stopper and flask (g)
(Initial mass) Mass of flask/stopper and water (g)
(Final mass) Mass of water delivered (g) Temp (°C) Density of water at Temp(g/mL) Actual volume of water delivered (mL)
1 42.6430 52.2288 9.6460 19.5 0.9699 9.9452
2 52.2288 62.1130 9.8842 19.5 0.96991 10.1908
3 62.1130 77.1108 9.9978 19.5 0.96991 10.2896
4 77.1108 93..5583 9.4722 19.2 0.9839 9.8272
5 93.5583 99.8130 9.2547 19.1 0.9706 9.8352
Table 4 illustrates the volume of water in g/mL, g, and temperature (°C) that was documented in the table above. The object that was used to determine the measurements was a 10.00L pipette.
Sample Calculations: The final Mass is subtracted from the initial Mass and that is how one comes up with the differences of the Mass.
Final Mass-Initial Mass=The Mass
The density for water was 0.989g/mL and the density for the Unknown Liquid was 0.998 g/mL,.
Table 4: Volumetric Data Table for the Volumetric Pipette. Trial Mass of stopper and flask (g)
(Initial mass) Mass of flask/stopper and water (g)
(Final mass) Mass of water delivered (g) Temp (°C) Density of water at Temp(g/mL) Actual volume of water delivered (mL)
1 42.6430 52.2288 9.6460 19.5 0.9699 9.9452
2 52.2288 62.1130 9.8842 19.5 0.96991 10.1908
3 62.1130 77.1108 9.9978 19.5 0.96991 10.2896
4 77.1108 93..5583 9.4722 19.2 0.9839 9.8272
5 93.5583 99.8130 9.2547 19.1 0.9706 9.8352
Table 4 illustrates the volume of water in g/mL, g, and temperature (°C) that was documented in the table above. The object that was used to determine the measurements was a 10.00L pipette.
Sample Calculations: The final Mass is subtracted from the initial Mass and that is how one comes up with the differences of the Mass.
Final Mass-Initial Mass=The Mass