Is the rusting of a rock a chemical change?

Answer 1

Yes, because a new substance is formed; and there are actually two kinds of rusting: red and black.

Rusting occurs when iron (or steel, which is mostly iron) combines with oxygen. Water promotes the reaction, so keeping the metal completely dry (including nearly zero humidity air) or completely covered with a water-resistant coating is the recipe for keeping the iron or steel from rusting.

When rusting occurs in the air where plenty of oxygen is available, the rust formed is a reddish-brown compound called Iron (III) Oxide, Fe2O3. The equation for its formation is 4Fe + 3O2 ---> 2Fe2O3

When rusting occurs underground or underwater where the amount of oxygen available is reduced, the rust formed is a hard and brittle black compound called Iron (II) Oxide, FeO. The equation for its formation is 2Fe + O2 ---> 2FeO

Answer 2

Rusting is a chemical change.

Answer 3

yes rust is a chemical change

Answer 4

if the rust is rainbow colored

Answer 5

chemical