 | Project title: which cleaner will clean a cooper penny |
Difficulty level: | Elementary school |
Main link: | None |
Hypothesis:
I think the vinegar will clean the penny best. MY other two cleaners I am using are salt and water, and vinegar and salt.
What is the stuff on the penny that makes it dark?
Materials:
3 dirty dark pennie.
3 cleaning solutions: vinegar,vinegar and salt, and salt and water.
The Procedure:
Put one penny in each solution.Watch. Note different changes on different days
Results:
so far vinegar is cleaning the penny.
Please help me find why the venigar is working best. What is the reaction?