Conclusion. Which solution will clean copper pennies the best, soap and water, lemon juice, vinegar and salt, coca cola, or ketchup? If I put a copper penny in soap and water, lemon juice, vinegar and salt, coca cola, or ketchup, then vinegar and salt will clean the copper penny the best because it has the most acid.
Conclusions – Cleaning Pennies. The project that I made, consisted in cleaning up old and dirty pennies. For cleaning up, I used a variety of materials such as lemon, vinegar and salt, water, water with soap.
This is the step by step procedure to the cleaning coins experiment.. conclusion that the ketchup and the vinegar + salt mixture cleaned the coins the most?
This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.
Conclusion. I found that my hypothesis was correct, that none of the other solvents except for the vinegar and salt mix could clean the dirty pennies. This was .