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How Salty Does the Water Have to Be for an Egg to Float?

science project
by

Naiyu Garrido

on 5 January 2015

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Transcript of How Salty Does the Water Have to Be for an Egg to Float?

Problem Statement:
How salty does the water has to be for an egg to float ?

How Salty Does the Water Have to Be for an Egg to Float?

If I use a serial dilution with low concentration of salt the egg then, would not float on the water.
Experimental Procedures:
1- Take one egg out of the refrigerator and allow it to warm at room temperature.
2- Make a stock solution of 1 cup of salt dissolved in 1 qt. of water, as follows:
a. Pour 3 cups of water into your 1-quart container.
b. Add 1 cup of salt.
c. Stir to dissolve.
d. Add more water to make 1 qt.
e Stir to mix completely.
3- Make a two-fold serial dilution of the stock solution, as follows:
a. Label four of the plastic cups 1-4. Label the fifth cup Tap water. Cup 1 will be for the stock solution, cups 2-4 will be for the dilutions.
b. Add 3/4 cup of your stock salt solution to cup 1.
c. Add 3/4 cup plain tap water to cups 2-5.
d. Measure out 3/4 cup stock solution, and add it to cup 2. Mix.
e. Measure out 3/4 of the solution from cup 2 and add it to cup 3. Mix.
f. Measure out 3/4 cup of the solution from cup 3 and add it to cup 4. Mix.
g. Starting with cup 5 and working your way up, test the egg in each solution to see if it will float. Use a soup spoon to lift the egg in and out of the cups.
Hypothesis:
Purpose Statement:
The goal for this project is to determine what salt concentration will float an egg.
Materials
. 4 16oz plastic cups
. 1 Cup of table salt
. 1 quart of Water
. 1 Measuring cup (liquid)
. 1 Container 1-quart(qt)
. 1 Spoon for stirring
. 1 Spoon for egg transfer
. 5 Eggs
If I use a serial dilution with low concentration of salt the egg would not float on the water, but instead if I use a serial dilution ( a method for diluting a solution in regular steps.) that has 50 % of salt concentration it will work because the salt increases the mass without changing the volume of the water very much. With the right concentration of salt added into the water the density of the water will be higher than the egg's and then egg will float.
Results
Cup 1 had the most concetration of salt which made the egg float.
Conclusion
Graph
Naylen Oliver
Full transcript