01:160:171 Lecture 3: Density of WaterExam
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Signiﬁcant Figures and the Density of Water
September 18th, 2018
1 Lab Objective
In this ﬁrst experiment, we calculate the density of water experimentally, using a beaker, buret, and an
Density Density is recorded as mass
While using the analytical balance, measurements of mass should be recorded to the highest precision
available. In this laboratory, record the measurement of mass to the nearest milligram.
a. Record the mass of an empty 50 ml beaker. Record the value in Table I. The mass of the empty
beaker will be the same for all trials.
b. Record the initial burette reading in the table.
c. Add between 1.0 ml to 1.5 ml of water to the beaker. Weigh the beaker and record the mass as beaker
+ liquid. Do not discard the water: for each trial, the volume of water will always be increasing.
d. Record the ﬁnal burette reading in the table.
e. Subtract the ﬁnal and initial burette readings to obtain the volume of water added to the beaker.
Record this value in the table.
f. From the mass of the beaker + water, subtract the weight of just the beaker. This will reveal the
mass of the water in the beaker. Record this in table I.
g. Repeat this procedure four more times, adding water to the beaker each time.
h. Plot the mass of water vs. volume in water in ml on the ﬁrst graph, then ﬁt a straight line to it. The
slope of this like will be the density of water in g/ml.
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