Perkins School for the Blind Secondary School student Cullen Gallagher shares his science fair experiment testing the hypothesis: “I think the boiling point [of water] will stay the same after adding salt.”
Listen to Cullen’s Radio Interview:
Can the boiling point of water be changed?
I think the boiling point will stay the same after adding salt.
I will boil water and add a substance like salt to see if the boiling point increases. The lab quest would be used to take temperature.
Beginning water temp. equals 19.2 degrees C.
When I did my experiment, I learned that salt increases the boiling point of water. Not only does salt raise the boiling point, but it also lowers the freezing point. When the water finished boiling without salt, the temperature was 99.5 degrees C. When I added 3 tsp. of salt, the temperature increased to 101.6 degrees C. My Internet search confirmed this. If you would like to see the rest of my observations, please see the bar graph. The molecules moved faster when the temperature was raised. They also collided more frequently. I learned a lot by doing this experiment.
Listen to the Radio Interview with Cullen Here
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