Tori C

Tori Cafeteiro Home base: King
March Science
Independent Project
Introduction:
My testable question is which boils faster, water, or water combined with salt? My hypothesis is that I think the water added with salt will be the one to boil faster, because the element in the salt (Na CL: Sodium, Chloride) heat the water more; which more heat makes it boil faster.
The salt compared to how much space it takes up makes the water heat up faster because it is increasing the density of the water. Since salt mixes with the water and the salt has more density. So if since that is true the salt creates more density in the water; salt molecules attract to the water molecules. Density is how heavy an object is. The density of water is 1 gram per millimeter. “Fresh water has a density of 1.0 while salt water has a density of 1.025.”(Salt water VS. Fresh water)
To boil water, it needs to heat up 100 degrees Celsius (never goes higher), but adding salt makes it boil up to 104 degrees Celsius. The boiling point of water is when the water vapor is equal to the liquid. "The boiling point of an element or a substance is the temperature at which the vapor pressure of the liquid equals the environmental pressure surrounding the liquid"(Wikipedia.com).

Materials and Methods:

1. Salt (9 total teaspoons)
2. Tap Water (100mL for each beaker, 9 beakers in total)
3. Spoon
4. Beaker
5. hot plate
6. Stopwatch
7. cup (16 oz)
8. data table
9. Pot
The first thing I must do is put water in 3 beakers, filling them 100 ml. I will start the stop watch to 0 and then I will pour 100mL of water into the pot then I put it on the hot plate. I will record the time that I first see bubbles, and then also when it is boiling vigorously. After the first beaker is done boiling than I will boil two more after that, all with plain water. Then when I’m done with them, I will take the average of the three trials, and then make a graph to represent it. I am doing three trials because if I just did one test then it wouldn’t be accurate, and I take the average because that would tell me the average amount of time it takes to boil water/ boil water to the fullest.
Next, I will test how fast it water with 1 teaspoon of salt takes it to boil. I will boil 100mL water mixed with 1 teaspoon of salt, I will do this three times. When all three trials are completed, I will take the average and make a graph. Then I will test 100mL water with 2 teaspoons of salt 3 times. Then I will take the average and make a graph. When I’m done I will finish my discussion and results.
Data Table:
Amount of time to boiling: 1st # = First bubbles
2nd # = vigorous boiling
Type of water Trial 1
Trial 2 Trial 3 Average
Plain water
Salt water(1 ts)
Salt water (2 ts)

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