I looked at my coin collection, and I thought of something. Everyone said: “Just put them in vinegar” or “Cleaning them with soap is enough”. No. Those methods don’t work at all, my coins are still dirty. I’m going to need an experiment.
The first beaker has hydrochloric acid, the second has sodium hydroxide.
I’m going to use these two coins to test.
Look at that! I put this coin in the hydrochloric acid for 1 second. Compare to the spot that didn’t touch the chemical.
I put the coins into the sodium hydroxide, but it didn’t work.
I’m going to compare the coin that has been dipped into the acid.
The left coin: before I dipped it into the acid.
The other coin: after I dipped it in the acid.
I dipped all of the coins from my collection, but it turns out that the acid created a reaction and made the coins black…
Well, I’m guessing we’re back at the starting point 😦
Conclusion: It didn’t work at all.