Then theirs change. *pun not intended*

Aim- To turn copper into silver and gold

Equipment-

• Two small beakers (50mL and 250 mL)
• bunsen burner
• tweezers
• Zinc sulfate 100g
• Zinc metal, grandular 100g
• glass stir rod
• tap water
• Copper pennies, well cleaned 

Method-

1. fill the small 50 mL beaker 3/4 full tap water. this is your rising beaker. set aside
2. dissolve 30 grams of zinc sulfate in 100mL of water in the 250mL beaker. a little heat from setting on the bunsen burner will hasten this dissolve.
3. place mossy zinc pieces in the beaker with the zinc sulfate solution, enough pieces to almost cover beaker bottom 
4. using tweezers, place two or three cleaned up pennies in step three beaker making sure pennies touch the grandular zinc pieces and are not touching each other 
5. bring the solution to a low boil for about 10 minutes. your pennies will slowly turn a silver colour.
6. using tweezers, carefully remove the pennies from the solution, rinse and cool them in small wash beaker then dry them on a paper towel.
7. Boom! ✨magically✨  you have  you have coloured pennies (coins)

https://www.sciencecompany.com/Turn-Copper-Pennies-Into-Silver-and-Gold-Pennies.aspx

Results-

Discussion-
a coin *a ten cent* is dipped into zinc sulfate and in contact with the zinc, the coin starts its change. the coin is plated with zinc and appears silver to the human eye. the coin that looks silver because of the zinc is placed above the bunsen burner flame for about half a minute (30 seconds) and then it should appear gold to the eye. the zinc and copper form an alloy of brass. the coin now appears gold.

Evaluation-
if I were to this whole experiment again I would definitely not use the actual metal I would use the zinc powder. when we use the zinc metal it takes way too long to actually put the plating onto the coin. but when we added the zinc powder it went 10x faster than it was.