Reaktion von flüssigem Gallium mit Aluminium

Reaction of Liquid Gallium with Aluminum Facebook:   / thoisoi2   Hello everyone, today we will conduct more experiments with an unusual metal, gallium. This metal has an interesting property. It is capable of forming an amalgam with another metal, such as aluminum or iron. To demonstrate this property, I will conduct an experiment. Let's take the aluminum cooler from a computer and drop about 2 grams of liquid gallium onto it. To accelerate the reaction of gallium with the aluminum, its surface was scratched with a knife. During the fusion, gallium penetrates the crystal lattice of the aluminum, thereby destroying its structure. In this case, aluminum becomes very brittle, like glass. I will soak the aluminum cooler in gallium for a few days. After 2 days, we need to wash off the unreacted gallium residue from the aluminum. Now let's test the fragility of the aluminum cooler. As you can see, with a little effort, aluminum begins to break easily in my hands. If I had left the gallium-impregnated cooler in place any longer, it would have become even more fragile. Now let's conduct another experiment. Take a sheet of aluminum foil and fold it several times. Next, we need to cut it into small pieces. And add a few drops of liquid gallium to these pieces. Now let's start making gallium and aluminum alloys by stirring them. Over time, you will notice that the aluminum dissolves in the gallium, and the foil turns into a silvery slurry. This paste is an amalgam of aluminum and gallium, which has an unusual property. When you drop it into water, large amounts of hydrogen are produced. The reason is that when aluminum and gallium are alloyed, gallium prevents the formation of the protective oxide film on the aluminum surface. Without it, the aluminum quickly begins to react with water, forming hydrogen and aluminum oxide. However, gallium is not consumed in this reaction. It can be collected and reused. This property of the gallium-aluminum alloy was patented by an American company for the production of hydrogen. However, due to the high price of gallium, this project never became available to the masses. Stay on my channel and you'll learn about some more amazing properties of gallium metal.