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Experiment demonstrating how vinegar and salt clean pennies over 1 hour, 2 hours, 3 hours, and overnight.

A step-by-step visual experiment showing the effects of vinegar and salt on pennies over time, comparing rinsed and non-rinsed pennies on cotton pads in a container.

JPG 568×1024 54.9 KB Free · Personal Use

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ID: #516930

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(view all middle school science fair projects)