Hydrated iron -III- oxides- Fe2O3-nH2O What is this-

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Standard XII

Chemistry

Prevention of Corrosion

hydrated iron...

Question

hydrated iron (III) oxides, Fe₂O₃.nH₂O What is this?

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Solution

When iron is exposed to air, it accumulates a brown color substance on its surface called rust. Rust is chemically known as hydrates of iron oxide with general formula Fe₂O₃.nH₂O.
The reaction can be written as:
4Fe + 3 O₂ + nH₂O $\to$ 2Fe₂O₃.nH2O

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Similar questions

The metal Iron (Fe) when exposed to moist atmosphere forms hydrated Iron oxide as per the following reaction. This process is known as rusting which does not take place in the absence of ‘Y’. Identify ‘Y’ in the reaction.
Fe+O₂+Y→Fe₂O₃.nH₂O

Q. Rust is hydrated iron (III) oxide,

{F e}_{2} O_{3} . x H_{2} O

. (reddish brown powder). How is it obtained?

Slow oxidation of iron to form hydrated iron oxide is called:

Q. What happens when (write reaction only)
i) Steam is passed over hot aluminium.
ii) iron (III) oxide

(F e_{2} O_{3})

heated with a reactive metal Aluminium .

Q. Assertion :Zinc is used for galvanising iron. Reason: Rust is hydrated ferric oxide.

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hydrated iron (III) oxides, Fe2O3.nH2O What is this?

When iron is exposed to air, it accumulates a brown color substance on its surface called rust. Rust is chemically known as hydrates of iron oxide with general formula Fe2O3.nH2O. The reaction can be written as: 4Fe + 3 O2 + nH2O →2Fe2O3.nH2O

hydrated iron (III) oxides, Fe₂O₃.nH₂O What is this?

When iron is exposed to air, it accumulates a brown color substance on its surface called rust. Rust is chemically known as hydrates of iron oxide with general formula Fe₂O₃.nH₂O.
The reaction can be written as:
4Fe + 3 O₂ + nH₂O $\to$ 2Fe₂O₃.nH2O