ATAR Notes: Forum
HSC Stuff => HSC Science Stuff => HSC Subjects + Help => HSC Chemistry => Topic started by: frog1944 on September 28, 2017, 03:13:48 pm
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Hi,
I saw the following practical to determine the rate of corrosion of metals in different oxygen concentrations
"1. Placed 3 nails in separate test tubes (Boiled then cooled sea water covered with oil – removes oxygen, Normal sea water, Sea water and 3 drops of hydrogen peroxide.)
2. Left for 2 weeks and observed corrosion
Results
Nails in water with oxygen showed mild levels of corrosion. Nail with low oxygen had very little corrosion"
I'm confused about the "Sea water and 3 drops of hydrogen peroxide", what does this have to do with the oxygen concentration?
Thanks