Title: Mass of Copper and
Sulfur
Purpose To determine if mass changes when
two substances are heated.
Hypothesis: If, then…because
Materials:
balloon
sulfur
burner
ring stand
Balance
Apron
test tube
copper
burner stand
test tube clamp
goggles
Procedure:
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With a piece of weighing paper measure 2 grams of copper.
2. With a piece of weighing paper measure out 1 gram of sulfur.
3. Add the copper and sulfur to one test tube.
4. Place the balloon over the mouth of the test tube.
5. Mass the system. Record the mass.
6. Heat the system.
7. Allow the system to cool.
8. Mass the system. Record the mass
9. Dispose of copper sulfide in the trash.
10.Clean up
Data
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Mass of system before __________g
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Mass of system after
__________g
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Change in mass
_________g
Class Data – Change in mass
A hr
B hr
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1. +0.00 g
1. -0.98 g
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2. +0.01 g
2. +0.00 g
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3 +0.05
3. -0.04 g
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4 +1.00 g
4. +0.00 g
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5 +0.55 g
5. -0.01 g
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6 +0.97 g
6. – 0.01 g
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7 15.672 g
7. +0.01 g
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8 -0.20 g
8. +3.02 g
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9 +3.83 g
9. -0.01 g
Histogram
Research questions
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None (:
Conclusion – the parts
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1) Restate the purpose
The purpose of this lab was to …
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2) Restate your hypothesis
I hypothesized that if … then … because …
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3) Three pieces of evidence that determine whether the
hypothesis was correct or incorrect
a) My change in mass was +0.01 g.
b) Accounting for precision, my change in mass rounds to
0.0 g.
c) Most of the class also obtained a change in mass of 0.0
g, as shown in the histogram.
 Right or wrong? Right.
Conclusion – the parts
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4)The theme
Law of conservation of mass/matter
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5) A scientist who has worked with the theme/an
experiment like this/etc.
Go forth and find one! (:
Conclusion - finale
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Now, string it all together
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Paragraph form