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RUST: WATER VS SALT WATER
Transcript of RUST: WATER VS SALT WATER
water.I think it will rust faster in saltwater because
it is more of an conductor than tap water.Conductors play a big part because it can burn the nail ,which may cause it to darken. Antonio Roddy 7th MRS.WILLARD I picked this topic because I have always wondered if salt water will rust metal faster than tap water. PURPOSE The purpose of this experiment is to
see if the nail will rust faster in tap water
or saltwater.The question behind this experiment is why would a nail rust faster in
tap water vs saltwater.This can be helpful to other scientist because it can show what type of water can rust metal.It could also
help explain the reason for rust. Source 1-
kelsey. "Why Do Nails Rust?." KnowsWhy. July 10, 2010 < http://www.knowswhy.com/why-do-nails-rust/ >. In this website I learned that nails rust because of the
iron in it.I also learned that when iron rusts it
begins to weaken and break. Source 2 - Todd Whitcombe, Associate Professor, Chemistry.Chemistry.Madsci.org.Tue Jan 12 14:57:50 2010 http://www.madsci.org/posts/archives/2010-01/1263409112.Ch.r.html. In this website I learned that iron won't
rust without oxygen. I also learned that
the formula for rust is Fe + O2 + H2O = Fe2O3.xH2O. BACKGROUND RESEARCH Source 3- Michael Pollick,A. Joseph,L. S. Wynn.
What Is Rust?.wisegeek.org.06 December 2012
http://www.wisegeek.org/what-is-rust.htm. While reading this website I learned that rust is
another name for iron oxide.I also learned that
when salt is in the water the iron corrodes faster. BACKGROUND RESEARCH Source 4- Manjula Gupta.Why does an iron nail gain weight on rusting?.timesofindia.Dec 20, 2009
http://articles.timesofindia.indiatimes.com/2009-12-20/open-space/28106091_1_iron-oxygen-mass I learned that when a nail rusts it gains weight.
I also learned that the mass is increased by the
mass of the oxygen inside the iron. BACKGROUND RESEARCH Source 5- Shane Klanton.Dangers of Rust.
ezine articles.July 29, 2010.
http://ezinearticles.com/?Dangers-of-Rust&id=4762827 I learned that rust is called oxidation. I also learned that
rust is an natural event that can only be taken care of
with care. EXPERIMENTAL DESIGN Constants: tap water,saltwater,2 nails,
Dependent Variable(s):2 nails
Independent Variable(s):open/closed lids,amount of
water and oxygen MATERIALS The materials i used to complete this
experiment were:2 nails,1 bowl,1 glass
jar with lid,4 cups of water for each jar,
tap water,and water with salt added
(saltwater). PROCEDURE The steps to this experiment are:
1) take 2 nails
2)find a bowl and glass jar with lid
3)find some food salt
4)add 4 cups of water to each container
5)add salt to glass jar and stir
6)place 1 nail in each container
7)close lid to glass jar and leave bowl uncovered
8)wait for 5 days
9)check results DATA ANALYSIS RESULTS CONCLUSIONS BIBLIOGRAPHY •Source 1-http://articles.timesofindia.indiatimes.com/2009-12-20/open-space/28106091_1_iron-oxygen-mass
•Source 3-< http://www.knowswhy.com/why-do-nails-rust/ >
•Source 5-http://www.wisegeek.org/what-is-rust.htm Days of rust % Day 1 Day 2 Day 3 Day 4 Day 5
Tap water nail 5 20 45 70 100
Saltwater nail 0 5 9 20 40 What happened as a result of my experiment
is the tap water nail rust faster than the saltwater
nail.I also found that the saltwater nail had a little
amount of rust too.The tap water nail rusted faster
because of the oxygen that was exposed to it. This
solves the the question of the experiment I stated in
my purpose. My major results were the amount of rust
and the time taken for the nails to rust.The
results of my experiment did not support my
hypothesis.My results did match the information
I read on the background research websites.One
possible explanation I have for the results of this
experiment is that the saltwater nail did not have
any oxygen,therefore it couldn't perform the
rust sequence.The error that impacted the most was not taking the lid off of the jar,which mean the saltwater nail did not get oxygen.I would improve this experiment by putting the nails in jars without a lid.Further study could be done from this experiment by adding different liquids
to put the nails in.