What is the chemical formula for aluminum foil?

Answer 1

The composition of aluminum foil is NOT 100% pure aluminum, as many people believe. You may have noticed that aluminum foil always seems dull on one side, and shiny on the other. This is caused by a naturally-occurring reaction. When Aluminum comes into contact with oxygen, the two elements undergo a spontaneous reaction: 4 Al(S) + 3 O2 (G) => 2 Al2O3 (S) The aluminum foil reacts with oxygen in the air to form a thin layer of Aluminum Oxide on one side of the foil. Because rolls of aluminum foil are generally rolled tightly, the inner side of the aluminum foil is not exposed to the air as much, and it remains shiny. In short, the composition of aluminum foil is pure aluminum (Al) AND aluminum oxide (AL2O3). (And don't worry-- the layer of aluminum oxide on aluminum foil is completely harmless. We've been using foil to cover food for years, after all.)

Answer 2

Aluminum (Al) foil doesn't have a "molecular formula" because it's all aluminum. The foil is made from a solid block of refined aluminum (all Al) and rolled and rerolled to compress it and form the foil. One way to evaluate aluminum foil might be to look at the metallic crystal structure that results at the end of the rolling process through which the foil is manufactured. But that requires another question.

Answer 3

Alumina is synthetic aluminum oxide of the molecular formula Al2O3. It is used in the smelting of aluminum metal, as a raw material for ceramics, and in chemical processing.

Answer 4

Al2 O3

Aluminium Oxide

Answer 5

Al2 (SO4)3

Answer 6

Al2O3

Answer 7

Al(s)

Answer 8

C3Al2O9