With the water the acids were a bit weaker but they didn’t make an enormous difference. The vinegar didn’t do anything to the tinfoil, but made a bunch of brown powder come off the pasta (although the piece of pasta was still completely intact) and a bit of copper come off the penny. The toilet bowl cleaner made the tinfoil disintegrate into less than 0.1 mm of aluminum oxide and he pasta had turned a little bit blue. So most of our hypothesis was correct, the toilet bowl cleaner was the strongest acid overall and the lemon juice was the weakest acid. But overall the tinfoil was the least intact after sitting in the acid.

Error: Because we didn’t extract the pulp from the lemon juice, mold grew on the surface of the lemon juice, but nothing changed the materials.

If we were to redo this project we would: take the pulp out of the lemon juice so the mold wouldn’t grow, we would add another acid, and/or material, we would try to preserve the materials once we took them out of the solution, and we would keep the materials in the acid for a longer period of time (ex. 2 weeks). We might also experiment we different amounts of light and heat.