Copper Coin Experiment

Methods
-Clean coin in salt-vinegar solution
-Put 50 mL of 2molL-1 Na OH into a beaker
-Heat on bunsen burner until nearly boiling- Stir as heating then take off heat.
-Add a spatula of zinc powder
-Heat lightly for 3 min, with coin in- stir as heating
-Take coin out with tongs
-Rinse coin under water to remove chunks of zinc
-Wave coin in blue flame using tong.

Observation
At the started Copper colour was brown. After we heated it up in 2molL-1 NaOH in a beaker and added zinc powder. We put the copper coin in the zinc hydroxide and stir it of a min. A min after we a take the copper coin outside by using a tong and the copper coin to sliver coin. Rise the sliver coin in water and wave the coin in the blue flame using tong.  When the sliver coin heat up it will change to a gold colour.

Copper colour(brown) to Sliver colour to Gold colour.