✏️ Unit 1: Tools of Chemistry Study Guide ✏️
What did we learn?
1. Safety- basic rules of how to behave, how to dress appropriately, and how to handle certain
situations (Ex: If you get something in your eye, use the eyewash station for 15 min.)
2. Equipment- identify pieces of equipment we have used so far and what they are used for,
compare uses (Ex: Beakers are used for approximate measuring whereas graduated cylinders are
used for exact measuring.)
3. CER- what does this stand for and what is each component? How to write one.
4. Graphing- make and read a graph using the rules given, identify the dependent and independent
variables, calculate slope, state the relationship shown on a line graph, use units correctly based
on a graph, show all work when solving mathematical problems, the difference between
interpolation and extrapolation
5. Accuracy, Precision, Percent error- use the percent error equation, comment on accuracy or
precision of data
6. Density- describe density in words and support it with particle models, use the density formula to
calculate any one of the three variable given the other two, determine if material will float or sink
a. Communicate scientific and technical information about why the molecular-level
structure is important in the functioning of designed materials. (Structure and Function)
(blue portion is an engineering standard, orange is a content standard, and green is a
cross-cutting concept)
7. Convert within the metric system. (Ex: 34m = 3400cm), understand units and scale
8. Classify different types of matter - element, compound, heterogeneous mixture, solution,
separation of mixtures, 3 states of matter, physical vs chemical properties and changes.
How to study:
1. Redo old practice problems
2. Use problems from the textbook (answers to textbook problems are given in the back for odd
problems)
3. Look at any notes you have taken or that I have posted. Do they make sense? Could you explain
them to your friend?
4. Quiz your friend. Make your own quiz.
5. Make a list of specific questions you have and ask Ms. Campbell. Do NOT say, “I don’t understand
any of this.” Rather say, “For this problem, I can’t figure out where the units of g/cm3 came from.”
Part I. Measurement
Be sure to:
● Check the values for each division/grading (what does the instrument go by?)
● Read the correct “certain digits”
● Read to 1 uncertain digit only
● If measuring volume, read to the bottom of the meniscus
● Use the correct units with your reading
Read the following measurements precisely. Include uncertain digit and unit!
1. Some graduated cylinders measure to the tenths place. Roger measures his chemical sample
and records 2.19 mL. His partner, Melissa, measures and records 2.199 mL. Who is correct?
Explain to the “wrong” student what they did wrong.
2. A caliper is marked to the tenth of a centimeter. Which of the following measurements would be
acceptable using this caliper? Explain how you know.
a. 6 cm b. 6.1cm c. 6.10cm d. 6.101cm
More practice - virtual length measurement , virtual volume measurement
Part II. Metric Units and Conversions
More practice - Length Conversions with Metric Units
Use “King Henry Died” to convert the metric units
1. 1 cm =
mm
2. 2.5 kg =
g
3. 4.83 mm =
m
4. 250 mL =
L
5. 10.2 dag =
cg
6. 22.4 L =
hL
7. Provide the metric system unit and prefix that would be the best to use when measuring the
following:
a. The length of your finger:
b. The mass of a peanut:
c. The volume of a glass of soda:
d. The length of your basement:
e. The height of Mount Everest:
f. The mass of a horse:
g. The volume of water in a bathtub:
8. Of the following measurements, UNDERLINE the one that is the largest.
a. 5 km or 5 mm
b. 12 dg or 12 dag
c. 1 m or 50 cm
9. Of the following measurements, UNDERLINE the one that is the smallest.
a. 10 m or 10 hm
b. 25 cg or 25 dag
c. 2 km
or 5000m
Part III. Density and Percent Error
Use your WS’s and labs from class for more practice
1. A line has an actual length of 76.49 cm. Are the measurements listed below accurate? Are
they precise? Explain how you know.
a. 76.48 cm, 76.47 cm, and 76.59 cm
2. Students used a balance and a graduated cylinder to collect the data shown in the table.
a. Calculate the density of the sample. Show work
b. If the accepted density of this sample is 6.95 g/mL, calculate the percent error.
3. A block has a mass of 70 grams and a density of 1.5 g/mL. What is the volume of the block?
Part IV. Graphing - See the graphing guidelines from notes and review labs for more review
A student completed a lab in which they
measured the mass and volume of various
pieces of ice. The goal of the lab was to use this
data to determine the density of ice. The data is
shown below.
1. Construct a graph of the information,
remembering to include all of the
components that you need for a good graph.
Draw a best fit line (you can do this on a separate sheet of paper if you need to or make it on
google sheets)
2. Calculate the slope (with units), rounding your answer to the hundredths place.
3. Using your graph, what would be the volume of the ice cube if it weighed 34.5 g? What would be
the mass of the ice cube if it had a volume of 51.4 mL?
Part V. Matter Classification -
✏️ Extra Practice - Classification of Matter 2023(online only)
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