CHEM 1030L — Measurements I
Name:
______________
Grade:
______________ (For Instructor use)
Laboratory Report
Date: ____________
Section: ______________
Lab Sta. #: ________
Lab Report Instructions: Enter text or data in the YELLOW fields. Copy results from the Calculations sheets into the BLUE
fields. The highlights are provided to clarify where data, text, and calculation results should be entered by the student. The
completed lab report should be printed for the instructor in black & white or gray scale.
Purpose
Instructions: Using 2-4 complete sentences written in third person with proper grammar and punctuation, briefly summarize the purpose of
this laboratory exercise. Include the learning objectives and the major outcomes.
Write the purpose of this Lab Exercise here…
Data Collection
Hint: ALWAYS include units of measurement and the correct number of sig. figs.
Part I: Determination of the Density of Solid Objects
Solid Sample #
Hint: Place the data for each solid object its
own column.
Shape
Color and other
observations
A.2. Mass of Object
B.1 Density of Solid by Direct Measurement
Length
Width
Height
Diameter
Calculated volume by
direct measurement =
Calculated density by
direct measurement =
B.2 Density of Solid by Volume Displacement
Final graduated
cylinder volume
Initial graduated
cylinder volume
Displacement volume of
object (mL) =
Displacement volume of
object (cm3) =
Calculated density of
object by displacement
(g/cm3) =
<–– Perform calculation in Calculations
section and place resulting answer(s) here.
<–– Perform calculation in Calculations
section and place resulting answer(s) here.
<–– Perform calculation in Calculations
section and place resulting answer(s) here.
<–– Perform calculation in Calculations
section and place resulting answer(s) here.
<–– Perform calculation in Calculations
section and place resulting answer(s) here.
Data Collection (continued)
Hint: ALWAYS include units of measurement and the correct number of sig. figs.
Part II. Determination of the Density of a Liquid
Sample #
Color and other
observations
Mass of beaker + liquid
Mass of beaker
Mass of liquid
<–– Perform calculation in Calculations section and place
resulting answer(s) here.
Volume of liquid
<–– From the pipette volume.
Density of liquid (g/mL)
<–– Perform calculation in Calculations section and place
resulting answer(s) here.
Insert Calculations section here
Questions and Analysis
INSTRUCTIONS: Using one or more complete sentences written in third person with proper grammar and punctuation, briefly respond to the
following questions.
Hint: Remember that points are awarded for each aspect of the question.
1.
Explain why beakers are not used to accurately measure the volumes of liquids in the lab. How are beakers
most commonly used as laboratory equipment? (Hint: An Internet search can be used to answer this.)
Type the response here...
2.
Is it possible to determine the mass of an object if only the volume and density is known? If so, explain how
to do it.
Type the response here...
3.
Is it possible to determine the volume of an object if only the mass and density is known? If so, explain how
to do it.
Type the response here...
4.
The volume of each solid object was determined two different ways: by (1) direct measurement and (2) volume
displacement. For the first object (be sure to state the sample #!), what is the volume by direct measurement and
the volume by displacement? Both measurements were performed on the same object, so the volumes must be the
exactly same, right?? Then, why aren't they? Think carefully about how the two measurements were made. What
factors could cause the volume measured by displacement to be different from the direct measurement method?
Based on your discussion, which method of volume determination is more accurate – by direct
measurement or by volume displacement? Explain your reasoning. (Hint: Imagine using these two methods to
determine the volume of an irregularly shaped stone.) Based on your response, which density is the most accurate for
each of the solid objects?
Type the response here...
5.
Identify the material used to make the first object. To do this, compare the calculated density of the object (be
sure to use the density that you decided is most accurate!) to the density table found in eLearn. Which is the closest
match? How close? How close is the next closest density? Also, compare the color of the object (and any other
observations made) to what is known about the matched material. [Hint: Suppose that your comparison of
densities leads you to suspect that your first object is aluminum, but you do not know what color aluminum is, you are
allowed to use a reference book or the Internet to find more information about aluminum.]
Sample ID #
_______
Object Material:
_________________
Type the response here...
6.
Identify the material used to make the second object, as described above.
Sample ID #
_______
Object Material:
_________________
Type the response here...
Conclusion
INSTRUCTIONS: Write an essay, using complete sentences, written in third person with proper grammar and punctuation, to briefly
summarize (1) the purpose of this laboratory exercise, (2) the work that was performed, (3) observations made, (4) any problems
encountered and how they could affect the results, and (5) the deliverables (densities of two solid objects and a liquid sample).
Use paragraphs to separate major ideas, however, do not number the paragraphs.
Type the Conclusion here...