Changing the
Boiling Point of Water
Purpose
To
determine how adding a solute to water will affect the boiling point of water.
Calculations:
1. Calculate the
molar mass of NaCl.
2. Determine the
amount of salt needed in grams to make a 0 M solution of salt that has a volume
of 200 mL.
3. Determine the
amount of salt needed in grams to make a 0.5 M solution of salt that has a
volume of 200 mL.
4. Determine the
amount of salt needed in grams to make a 1.0 M solution of salt that has a
volume of 200 mL.
5. Determine the
amount of salt needed in grams to make a 1.5 M solution of salt that has a
volume of 200 mL.
6. Determine the
amount of salt needed in grams to make a 2.0 M solution of salt that has a
volume of 200 mL.
Results: record the
temperature that the water boiled at in Celsius.
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Sample
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0 M
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0.5 M
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1.0 M
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1.5 M
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2.0 M
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Trial 1
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Trial 2
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Trial 3
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Average
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Concentration
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Average BP (°C)
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Change in BP from
100 °C (°C)
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0.0 M
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99.5 C
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-.5 C
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0.5 M
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1.0 M
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1.5 M
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2.00 M
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Analysis
1.
Graph
your data using the average boiling temperature (molarity on x-axis and
temperature on y-axis) and see if there is a line of best fit for the
data.
2.
What
occurs when you add salt to water? What is it causing to the water’s
properties?
What is the solvent,
solute in the solution? Explain why it is a
Can you add the page number to the lab posts
ReplyDeletethat would help a lot
thanks
Not really as I do everything by title. In my agenda, in the gradebook and when I post it. The dates I post it should help and there isn't that many labs!
ReplyDelete