Students will be able to observe how metals can combine to form an alloy. The student will explain the reaction that takes place. The student will predict how other alloys are formed. Carefully pour diluted nitric acid into an evaporating dish to full.
Nitric acid can cause burns.
Rinse spills immediately . Using tongs, grasp the penny and hold in the nitric acid for about 20 seconds. Remove penny with tongs and rinse in cold tap water. Place one teaspoon of 30-mesh zinc in second evaporating dish. Carefully add diluted sodium hydroxide to dish until liquid is about 2 cm above the zinc.