【自由研究】10円玉がキレイになる原因は酸なのか?

A popular independent research topic is "making a 10-yen coin sparkle." While it's often said that acid dissolves rust, I'm not sure if this is true. So, I decided to conduct an experiment to see if acid can clean a 10-yen coin. Twitter:   / yoidea   Instagram:   / yoidea   Tiktok:   / yoidea