BJ habson`s science fair project what_is_more_corrosive

Report
What is more corrosive?
By B.J. Hanson
Mr. leingang class 1rst period
Science fair project.
Question
Which common household liquid is the most
corrosive?
Hypothesis
If you put a piece of a hamburger in
different liquids, then the coke will dissolve
the patty the most, because it is used as a
cleaning agent.
Variables
• Mv: solution (coke, vinegar, bleach, water, salt
water, sugar water)
• Cv: amount of liquid(2 cups, 1 tablespoon of
salt/sugar if sugar/salt water), time in liquid (1
week), time of observation (8:30)
• Rv: amount of hamburger dissolved, or change in
meat/liquid
Materials
• 6 see through cups (or jars)
• vinegar
• bleach
• sugar water (one tablespoon of sugar)
• salt water (one tablespoon of salt)
• 1 hamburger patty cut into 6 equal pieces
•cola (not diet coke)
Diagram
coke
bleach
vinegar
water
Sugar
Salt
water water
Procedure
1: Setup see diagram.
2: Wait 1 week: record observations of what is
left of the hamburger/how it or the water has
changed every day
3: Clean up.
Data table
Liquid Cola
days
Bleach
Vinegar
Water
Sugar water
Salt water
1
Partly dissolved
Somewhat
bubbly
Expanded
White
Yellow
water
Cloudy, no
change in
meat
Cloudy,
Slightly
yellow
water
2
More has
dissolved
Absurdly
bubbly
Very
expanded,
White, and
Stringy
Orange
water,
Very slightly
dissolved
Very cloudy, Cloudy,
meat almost more yellow
completely
water
unchanged
3
Almost all gone
No change
No change
No change
Top half of
water
somewhat
orange
Orange
water
4
Completely
dissolved
No change
No change
No change
No change
No change
5
Mold
No change
No change
No change
No change
No change
6
Mold
No change
No change
mold
mold
No change
7
mold
No change
No change
mold
mold
mold
Conclusion
in conclusion, the coke dissolves the
hamburger the most. We can prove this
because the coke dissolved it COMPLETELY
while only the WATER dissolved it a little! That
is conclusive data. This supports my original
hypothesis. Therefore if you put a piece of
hamburger in different liquids then the coke
will dissolve them the most.
Background information
•
•
•
•
•
•
•
•
•
•
Bleach has a ph value of 12.322
Vinegar has a ph value of 2.4
Water and sugar/salt water all have a ph value of 7
Coke has a ph value of 2.5
A Lower ph means more acidic
The Lowest natural ph value ever is -3.6
A Higher ph means more basic
Phosphoric acid is included in coke but not other sodas
Phosphoric acid has a ph value of 1.8
Caffeine has a ph value of 2. 5

similar documents