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Science Lab Write UpTiffany Tran 7a Period 5 9/17/12
Problem or Question: Is a chicken egg hypo or hypertonic to tap water, Sprite,
and or corn syrup.
Background: hypertonic- more concentrated or more solute than the solution
Hypotonic-less concentration or less solute then the solution
Isotonic- equal concentration; diffusion- moving from an area of high concentration
to an area of low concentration; osmosis- diffusion of water through a semi-
permeable membrane
Independent Variable: The liquid solution that the egg, which is our cell in this
experiment, is placed in Sprite, corn syrup, or water.
Dependent Variable: Is the change mass of the egg (the water content of the
egg)
Controls:
The egg- which is a raw chicken
Day 1: in vinegar
Plastic cups
Environmental condition: temperature
Hypothesis: If I place the egg in tap water, then the water will want to go through
the membrane into the egg because the egg is hypotonic to the solution.
Materials:
Egg-which is a raw chicken
Vinegar- Heinz 5% acidity
Sprite
Water
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Corn syrup- Karo light
Triple beam balance
Cups
Spoon
Tray with cover
Beaker
Procedures:
1. First we obtained all the materials
2. Then, we used a triple beam balance to measure the mass of the egg in
grams
3. After, we placed eggs into individual cups and cover with vinegar and cover
with plastic wrap
4. Next, we let the eggs set in vinegar for 24 hours and then we drain them and
rinse with water
5. Then, we measured the mass of the eggs and record our observations
6. Next, we added different liquids such as Sprite, water, corn syrups, and more
vinegar to each cup
7. Then, we let the eggs set for another 24 hours and measure the mass of the
eggs every 24 hours for 3 days
8. After we measures everything, we returned the eggs to their same solution
Data analysis and claims: Egg 1 was submerged in corn syrup, and has lost 12
grams because the corn syrup is hypertonic, or more concentrated to the egg,
making the water come out of the egg into the liquid. Egg 2 was submerged inSprite, and gained 17 grams because the Sprite is hypotonic to the egg. The egg
has continued to lose its shell, and is slowly peeling off. Egg 3 is submerged in in
vinegar and has gained 28.5 grams. The egg is a yellow-ish color, and looks bigger.
Egg 4 is submerged in water and has gained 18 grams. It has gained so much
because the water is hypertonic to the egg. The egg looks very inflated.
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Conclusions: We thought that the water would go inside of the egg because the
egg is hypertonic to the solution. We were correct, because each day the egg got
bigger and bigger. On day 3 when the egg was fully submerged in water for 24
hours it gained 12 grams, and from there, each day it gained 1-2 grams. I think my
data is some-what reliable because we didnt use the same weight every single
time. I think the egg might have burst and everything would go wrong. I also thinkthis experiment related to what we are learning now because the egg is like a cell,
and the liquid is like the things passing in and out of the membrane. And what
would happen if we put it in fresh or salt water, it will change.