The experiment found that the coins are in the water with the highest pH values are clean as much as possible, because the acid milieu are concentrated the most corrosive, respectively, the concentration of the acid.
It was found that the Coin in the water with a high pH value most. The concentrated acid is the most corrosive effects of acid concentration, respectively.
It was found from the experiments that the coins in the water with the highest pH clean most Because the acid concentration is the most corrosion activity respectively concentration of acid