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Old 09-14-2008, 10:56 AM
mcanes2 mcanes2 is offline
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Question Metals Rus

Hi I need help on creating a background for my daughters science fair project; her title is Does saltwater make metal rust faster than tap water;
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Old 09-15-2008, 03:28 PM
Bioscientist Bioscientist is offline
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You can do the experiment by placing the same number of nails (your metal) into cups of different liquids: salt water of different concentrations (add 1 teaspoon of salt into one, 2 teaspoons of salt into the next, etc.) and the control will be tap water alone, with no salt. Each day, remove one nail from each cup, and compare the amount of rust. It will be nice to take a picture. Throw those nails away. The next day (or after 2 days), take another nail out and compare the different conditions. Most likely the presence of salt will increase the amount of rust.
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