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Does Increasing the Salinity of Water Increase the Boiling Point?
Jake Scarborough 5th period| McNeese | Syracuse Junior High
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What happens to the boiling point of water if I add
4.928922 milliliters (one teaspoon) of salt to 0.236588237
liters (one cup) of water?
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1.
2.
3.
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Facts:
Salt lowers the freezing the point of ice.
This makes salt melt the ice.
This is why we put salt on roads to melt ice.
Helmensteine, Anne Marie chemistry.about.com. about.com
(about.com). Web. 12 Jan. 2014.
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If I keep adding 4.928922 milliliters (one teaspoon) of salt
to .236588237 liters (one cup) of water, then it will raise
the boiling point because salt will raise the temperature at
which water will boil. Water typically boils at 100 degrees
Celsius (212 degrees Fahrenheit).
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Materials: A pot, cup, teaspoon, thermometer, rubber
spatula, oven mitt, and stove.
1. Boil water without salt for control.
2. Record temperature in Celsius and Fahrenheit.
3. Add a teaspoon of salt.
4. Boil water.
5. Record temperature.
6. Repeat steps until six trials are finished.
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1. Boil water without salt for control.
2. Record temperature in Celsius and Fahrenheit.
3. Add a teaspoon of salt.
4. Boil water.
5. Record temperature.
6. Repeat steps until six trials are finished.
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Constants: Boiling water without any salt to get a standard
temperature and average boiling point.
Controlled variables: I used the same pot, stove, and
thermometer.
Independent (manipulated) variable: The amount of salt
added.
Dependent (measured) variable: The temperature.
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I noticed that the boiling point without any salt was less
than 212 degrees Fahrenheit.
I think I hit the limit on the thermometer because I didn’t
record a reading over 209 degrees Fahrenheit (I chose 208
because it was more constant).
Trial Number
Amount of Salt
Added
(ml)
Temperature
(Celsius)
1
0
94.44
2
4.929
95
3
9.585
96.11
4
14.787
97.78
5
19.716
97.78
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I discovered that increasing the salinity in water increases
the boiling point. I also discovered that the boiling point is
lowered due to the elevation. My hypothesis was supported
by the evidence and data because I said the boiling point
would rise along with the salinity in the water.