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Proving Water is the Universal Solvent

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by

Alexandria O'Bard

on 19 August 2015

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Transcript of Proving Water is the Universal Solvent

Water
Water is a polar substance because it has both positive and negative charges.
Objective
The objective of our lab was to prove that water is a universal solvent through the demonstration of it's polar properties, using both polar and non-polar substances.
Materials
6 Beakers
500ml of water
500ml of oil
2 spoonfuls of salt
2 spoonfuls of baking soda
4 spoons
1 spoonful of water
1 spoonful of oil
Data Table
Conclusion I
Procedure Video
Proving Water as a Universal Solvent
Materials
Proving that water is the universal solvent, we conducted this experiment with salt, Baking Soda, Oil, and water. Based on our results we were able to prove that since water is polar, can dissolve polar solutes such as salt and baking soda.
Data Evidence
Oil S & Water S
Procedure
Alexandria O'Bard, Sharon Wang, Jane Truong, & Karla Zirkelbach
Period. 2 AP Biology
Citations
http://howyourbrainworks.net/content/neutral-polar-and-electrically-charged-particles
http://chemistry.about.com/od/chemistryglossary/g/Universal-Solvent-Definition.htm
http://www.eastpennsd.org/teacherpages/mharned/myfiles/Universal%20Solvent%20Inquiry%20Lab.doc
We found that this statement is true because water was able to dissolve salt and baking soda (polar substances) while it was not able to dissolve oil (a non-polar substance.)

Conclusion II
3 errors from the lab:

1.)The solutes were not in the solvent for the same amount of time before being observed.

2.) The temperature of each solvent was not considered or adjusted.

3.) We do not know the effect of inputting more than 1 teaspoon of each solute.

Conclusion III
Two ways we could change the lab to get different results is if:
1.) We stirred the mixture for more time.
2.) If we heated up the solvents before hand.

Conclusion IV
Hypothesis
If water is a universal solvent due to its polarity, then it will be able to dissolve other polar substances such as salt, and baking soda. If this is true then non-polar liquids, such as oil, will not be able to dissolve into water.

Two ways we could change the lab to get different results is if we :
1.) Stirred the mixture for more time
2.) If we heated up the solvents before hand.
Full transcript