# What is the chemical equation for the rusting of iron?

The oxidation reaction of iron and oxygen to form the substance that is commonly called rust occurs according to this equation: 4Fe + 3O2 = 2Fe2O3. Water is also required for this reaction to occur, but because the total amount of water does not change, it is not included in the equation.

The production of rust is an example of one of the most common chemical reactions on Earth: oxidation/reduction. In this type of reaction, some electrons are transferred from one substance to another. In this case, electrons are being transferred from the iron to the oxygen.

When iron loses three of its electrons to oxygen, it becomes the Fe3+ ion and oxygen becomes the O2- ion. The O2- quickly reacts with H+ ions in water to form H20. The Fe3+ ions also react with water to form iron oxide (Fe2O3), or rust.

Though the net amount of water remains the same in this reaction, the availability of water does limit the oxidation of iron, which is why iron rusts more quickly in a wet environment than a dry one.

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Q&A Related to "What is the chemical equation for the rusting..."
 4Fe + 3O2 + 6H2O - 4Fe(OH)3. The chemical equation for rusting of iron is : 2Fe + 3/2 O2 - Fe2O3.xH2O. http://wiki.answers.com/Q/What_is_the_chemical_equ...
 The chemical equation for rust, iron (II) oxide, is 2 Fe2O3. Thanks http://www.chacha.com/question/what-is-the-chemica...
 1. Write down the initial reagents of of the reaction iron rusting: Fe + O2 + H2O. 2. Write down the product of the reaction: Fe + O2 + H2O = Fe(OH)3. 3. Multiply the number of water http://www.ehow.com/how_8558862_write-chemical-rea...
 You can simply take it as Iron 3 reacts with oxygen to form rust: 4Fe(3) + 3O2 - 2Fe2O3. The Fe(3) means iron with the valency of 3. I guess you can find everything you need under http://answers.yahoo.com/question/index?qid=200805...
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