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Measurement Lab
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Purpose: To familiarize yourself with some equipment., materials, and techniques
in the laboratory, while at the same time taking measurements and calculating
densities of various materials.
Procedure:
PART 1
a) Measure an amount of water equal to 25ml using a 100m1 graduated
cylinder. Have the instructor check your results to see if you have measured
correctly. Recotd the temperature in the room in degrees Celsius,
Room Temperature
today:_o
C
Checked:
b) Using a 5Oml beaker and balance determine the mass of the 25ml water you
measured in part A. Fill in the data table below.
grams
1) Mass of the dry beaker
I.
2) Mass of the beaker and water
grams
3) Mass of water
grams
Based on what you know about the density of water, what would you expect
the mass of 25 ml to be?
II. What results would you expect for the mass of 25 ml of water if you use 25 ml
at a temperature of 99'C? Explain your answer.
III.
What results would you expect for the mass of 25 ml of water if you use
2Sml at a temperature of 4"C? Explain your answer.
PART 2
a. Using the metric rulers available and the 3 piece slab sets (Pieces marked AB-C); determine which of the three pieces have the same or almost the same
density. Figure the density in grams per cubic centimeter. Record your date
in the data table that follows,
Show your work for calculating density,
A
Length
width
Height
Volume
Mass
DENSITY
Calculations:
ry.
Which two have the same or almost the same density?
_&
PART 3
a.
Give two solutions labeled Solutionl and Solution2, determine which
solution has the greater density.
It is not good chemical practice to return chemicals to their original
containers, however for this activity we will return the solutions to prevent
unnecessary waste of materials,
ur
an
ids in t
lioui
Use any amount of liquid between 10 ml and 25 ml. Using a larger amount
of liquid will reduce the amount of possible error.
b.
Record your data in the table below:
Mass of dry beaker
Mass of the beaker and
Solution 1
grams
solution
Mass of solution
Volume of solution
DensiW of solution
V. Which solution
Solution 2
grams
grams
grams
grams
grams
cm3
cm3
g/cm3
g/ cm3
has the greater density?
VI. What is the kind of relationship between ml's and cm3?
PART 4
a. In a plastic container are samples of copper, iron, lead and aluminum. Find
the density of two of the metallic samples, using water displacement,
b. Make a data table, recording the measurements necessary and the resulting
densities.
PART 5: Thickness of Aluminum
a. Obtain a piece of aluminum foil from the instructor. Using the metric ruler,
carefully measure the length and width of the piece of aluminum. Record
this data in the table below. flnclude the correct unitsJ
b. Fold the aluminum loosely so that it fits on the electronic balance and
determine its mass. Record your data. flnclude correct units)
c. Given the density of aluminum, calculate the thickness of the sheet of foil.
Show your calculations.
Mass of aluminum
DensiW of aluminum
Width of aluminum
Length of aluminum
1J Using the formula for density, calculate the volume of the foil, knowing its
mass and the density of aluminum.
2)
Now, knowing volume, length, and width, calculate the height [thickness)
of the aluminum, using:
V=lxwxh