Problem:
What happens to a post 1982 penny that is placeed in strong HCl?
Procedure:
1. Record the date and mint of the penny being used.
2.Using a file, etch 5 marks on the outside of the penny
3.Place the penny in the strong HCl.
Picture: See below the laboratory writeup:
Chemical Reaction:
Zinc + Hydrochloric Acid ----> Hydrogen + Zinc Chloride
Zn + 2HCl ----> H2 + ZnCl2
Data:
List the year minted and place of mintage of the copper penny: ________________________________________
Conclusion:
1. What is the molecular shape of a water molecule? What is the angle between the bonds of a water molecule? What is the polarization of the water molecule?
2. Describe what the penny looks like after one day in the acid solution?
