- Clean coin in salt+vinegar solution
- Put 50ml 2moIL NoaOH into a beaker
- Heat on bunsen burner until Nearly boiling - Stir as heating then take off the heat.
- Add a spatula of zinc powder
- Heatlitly for three minutes, with the coin in - Stir as heating
- Take a coin out with tong
- Rinse under water to remove chunks of zinc
- Wave coin in the blue flame using tongs
The 2 color changes were silver and gold.
When we mixed the Zinc and the Sodium Hydroxide it caused the coin to go silver, Then we added heat and it went gold. They all combined together
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