Measurement Lab
Title: Hint, be descriptive and to the point
Question: How can
OHS measuring devices be used by students to accurately measure the density of
water?
Hypothesis: Hint,
your answer must include the independent and dependent variables you will test
to support or refute your question.
Test: Hint: Density
= Mass/Volume.
Materials:
(1) P200 micropipette, (1) P1000 micropipette, (3) Reaction tubes,
box of blue tips, box of yellow tips (1) 1000mL plastic waste beaker, (1) metric
balance, supply of dH_{2}0 in (1) small glass beaker, paper towels, safety
equipmenteyewear and aprons…….
Procedures: Hints, Make
sure your final procedures include labeled diagrams
 for the Rd just do your best to describe
how to use each material in a logical order
 for a diagram show how the P1000/ P200 window will read for each different
volume extraction and how you will use the balance.
 you will conduct at least of 3 trials of
data collection for each member
of your group
 you will need to empty reaction tubes of
any trace of water and re usethem between trials.
Data Table:
(example: Remember
that you need room for at least 9 trials!!)
Measurer

Mass of empty tube

Mass of tube and H_{2}O

Mass of H_{2}O

Volume of H_{2}O

Calculated H_{2}O
density







DON’T forget to
record observations of data collection.
Analysis:
This section should include
a graph of the data (mass on the yaxis & volume on the xaxis), the
formula for density, show at least one example of the math you did when
calculating density and answer the following questions. Hint you will want to convert measured μL – mL to answer the questions
 Check your accuracy for the measurement
lab; calculate percent error for the average of your three trials?
Percent
error = (measured average density – 1g/ml) . 100%
1g/ml
 What is the accuracy for the average of
all trials by your group?
 Which measuring device is most
accurate? Explain your answer
Conclusion:
Don’t forget to
explain what happened? Restate your
question and hypothesis and why you thought it was the best guess. What do you know about the answer to the
question? How does the data support your
answers? i.e.use numeric comparisons to
support your answers! How did human
error influence your data? How could you
further/redo this experiment for more accurate results? What is the social context for this lab? (This should be at least 3 paragraphs)
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