The student conducted an experiment to determine if water has the same mass in liquid and solid form. They weighed ice cubes and then melted the ice and weighed the liquid water. In two of the three trials, the masses were equal, supporting the hypothesis. However, in one trial the liquid water had a slightly higher mass, possibly due to sources of error like not fully drying the beaker. The student concluded that while the masses are nearly equal, more trials could provide more definitive evidence.

1. PORTFOLIO
 Experimental Design Lab Report Example

2. TITLE
The Mass of
H2O in 2 States
of Matter
(liquid & solid)

3. BACKGROUND
If a person compares the same
amount of ice and water, ice does
not have more mass than liquid
water. They do have different
densities though because liquid
water has more volume than ice.
The density if water is 1g/cubic cm
The density of Ice is .92g/cubic cm
Source: Helmenstine

4. PROBLEM QUESTION
Does H2O have the same
mass in liquid and solid
form?

5. REAL-WORLD CONNECTION
You need to carry a large
amount of water and want to
know if you should take it
frozen or in liquid form so that
it weighs less to carry.

6. MATERIALS
DIGITAL
SCALE
BEAKER
HOT WATER
ICE

7. LAB SET-UP beaker
Ice or water
digital scale

8. VARIABLES
Dependent Variable
The state of matter (solid/liquid)
(changed)
Independent Variable
Mass (measured)
Constants
scale

9. PROCEDURE SUMMARY
I wanted to see if the mass of a liquid
(water) and a solid (ice) were the
same. I weighed (mass) an ice cube
and then melted the same ice cube
and weighed (mass) it again.

10. HYPOTHESIS
What do you think will
happen?
What is your hypothesis?

11. HYPOTHESIS
If I measure the mass of
water as a solid (ice) and as
a liquid their masses will be
equal because they are the
same substance H2O.

12. PROCEDURE
STEP 1:
Weighed the
ice in grams
inside a 80mL
beaker on a
digital scale

13. PROCEDURE
STEP 2:
Poured 100mL
of hot water
from a hot pot
into a 500mL
beaker

14. PROCEDURE
STEP 3:
Put ice into a
80mL beaker
and placed
into 500mL
beaker with
hot water

15. PROCEDURE
STEP 4:
Waited for the
ice to melt in
the beaker

16. PROCEDURE
STEP 5:
Take melted
ice out of
500mL beaker

17. PROCEDURE
STEP 6:
Weighed the
melted ice
(liquid) on the
digital scale in
grams (g)

18. DEMONSTRATION
I will now demonstrate a
portion of the lab.
( ONLY if you have a demonstration)

19. DATA
MASS OF H2O in 2 States of Matter
Trial 1 Trial 2 Trial 3
Mass (grams)
Solid (ice) 60 62 50
Liquid (water) 64 62 50
Difference 4 0 0
Average Difference 1.3

20. GRAPH
0
10
20
30
40
50
60
70
1 2 3
60 62
50
64 62
50
Mass(grams)
Trials
Mass of H2O in 2 States of Matter
Solid (ice)
Liquid (water)

21. ANALYSIS & RESULTS
The data showed that 2 out 3 times, the mass of
liquid and solid were the same.
Dependent Variable
The state of matter (solid/liquid)
Independent Variable
Mass
So the state of matter (dependent variable) does
not change the mass (independent variable).
Relationship to Background Research:
According to my background research on the
mass of solid and liquid H2O, they should have
been the same. I found this was the case 2 out of 3
trials. This leads me to believe that I had a source of
error in trial 1.

22. SOURCES OF ERROR
ERROR #1
I may have forgotten to wipe off the excess
water when I removed it from the hot water.
EFFECT
This may have added mass to the liquid
ERROR #2
When I put the beaker with ice into the hot
water it tipped over, some water may have
gotten in
EFFECT
This may have added mass to the liquid

23. POSSIBLE REVISIONS
REVISION #1
I would try and use the same size ice cube
EFFECT
This will keep the masses more similar
REVISION #2
More trials
EFFECT
There would be more data to compare

24. CONCLUSIONS
If I measure the mass of water as a solid
(ice) and as a liquid their masses will be
equal because they are the same
substance H2O. I found that in most cases
they are the same.
Supporting Evidence:
Trial 2
Solid = 62g and Liquid = 62g
Trial 3
Solid = 50g and Liquid = 50g

25. CONCLUSIONS continued
Hypothesis: If I measure the mass of water as a solid
(ice) and as a liquid their masses will be equal
because they are the same substance H2O.
Supported:
My hypothesis was supported according trials 2 and 3 but
not in trial 1.
Trial 2 Trial 3
Solid = 62g /Liquid = 62g Solid = 50g / Liquid = 50g
Trial 1 (Not supported)
Solid = 60g and Liquid = 64g
(4 grams different – liquid had a higher mass)

26. CONCLUSIONS continued
NOW CAN YOU ANSWER THE
PROBLEM QUESTION?
Problem Question: Does H2O have the
same mass in liquid and solid form?

27. CONCLUSIONS continued
Answer: Yes, it looks
like the mass of H2O in
liquid and solid form is
nearly the same.

28. FURTHER RESEARCH
QUESTION #1
Do liquid and solid (ice) H2O have
the same volume?
QUESTION #2
Do liquid and solid (ice) H2O have the
same density?
QUESTION #3
Would there be the same results with
another type of liquid, juice for example?

29. SOURCES
"Density of Ice." Density of Ice. N.p., n.d. Web. 06 May 2015.
<http://elmhcx9.elmhurst.edu/~chm/vchembook/122Adensityice.html>.
"If Ice Is Just Water in Its Solid State Why Does It Float? • /r/askscience." Reddit. N.p., n.d.
Web. 06 May 2015.
<http://www.reddit.com/r/askscience/comments/1rk606/if_ice_is_just_water_in_its_solid_
state_why_does/>.
Helmenstine, Ph.D. Anne Marie. "Why Is Water More Dense Than Ice?" N.p., n.d. Web. 06
May 2015. <http://chemistry.about.com/od/waterchemistry/fl/Why-Is-Water-Less-Dense-
Than-Ice.htm>.
"Stock Photos & Video Footage." Stock Photos, Royalty Free Images & Video Footage By
Dreamstime Stock Photography. N.p., n.d. Web. 06 May 2015.
<http://www.dreamstime.com/>.