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Mattie Bush

What is the reaction of sulfuric acid and iron?

Derrick S.  Follow

There are two potential reactions that can take place - with dilute H2SO4, you get a standard metal-acid redox reaction - Iron (II) Sulphate & hydrogen gas are the products:

Fe (s) + H2SO4 (aq) → FeSO4 (aq) + H2 (g)

In hot concentrated solutions, the acid acts as an oxidising agent, the redox reaction producing iron (III) sulphate, water and sulphur dioxide gas

2Fe (s) + 6H2SO4 (l) → Fe2(SO4)3 (aq) + 3SO2 (g) + 6H2O (l)

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Blake Downer  Follow

The reaction between sulphuric acid and iron yields products which depends on the concentration of the acid.

*When sulphuric acid(H2SO4)
is dilute, the reaction equation is:

Fe+H2SO4----->FeSO4+H2

and when sulphuric acid(H2SO4)
is concentrated, the reaction equation is:

3Fe+8H2SO4---->FeSO4+Fe2(SO4)
3+4SO2+8H2O

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