Lab 1 - Densities of Liquids and Solids - Densities of...

Densities of Liquids and Solids
September 10 , 2007
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Results and Discussion:
The density of water (H
2
O) was calculated by using the formula D = M/V to ensure
accuracy and precision of the procedure.
Three experimental trials were performed. The mass of water was obtained by first determining
the mass of an empty 100mL beaker, then determining the mass of it filled with 20mL of water
(as measured in the beaker). The difference of the two would be accepted as the mass of 20mL
of water. The data was calculated and tabulated in Table 1.
Table 1: Density of Water (H
2
O)
Trial Mass (g) Volume (mL) Density (g/mL)
1 76.660-55.001= 21.659 20 1.1
2 77.275-54.918= 22.357 20 1.1
3 69.286-50.770= 18.516 20 0.93
The density of H
2
O was calculated using the density formula. An example of such a calculation
follows:
D = M / V
D = 21.659g / 20mL
D= 1.08295 ~ 1.1 g/mL
The average of these three determined values,
1.1 g/mL + 1.1 g/mL + 0.93 g/mL
= 1.04 g/mL ~ 1.0 g/mL
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was considered to be the standardized density of the water.
Given the relatively small average deviation,
|1.0 g/mL – 1.1 g/mL| + |1.0 g/mL – 1.1 g/mL| +| 1.0 g/mL – 0.93g/mL|
= 0.09
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