Rusting (4)

Chemistry

Question

Rusting (4)

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Other metals with the same characteristics with a layer of aluminum oxide (4)

Chromium

Effects of other metals on rusting (1)

When iron comes into contact with a more electropositive metal such as zinc, Zn, rusting of iron slows down

Effects of other metals on rusting (2)

Zinc atoms, Zn release electrons more easily than iron, Fe

Effects of other metals on rusting (3)

Zinc, Zn corrodes and undergoes oxidation. Half equation of oxidation Zn(s) → Zn2+(aq) + 2e‒

Effects of other metals on rusting (4)

The released electrons flow through iron to the metal surface where there is water and oxygen Half equation of reduction: O2(g) + 2H2O(l) + 4e‒ → 4OH‒(aq)

Effects of other metals on rusting (5)

When iron comes into contact with less electropositive metals, such as lead, the rusting of iron becomes faster

Effects of other metals on rusting (6)

Iron atoms, Fe lose electrons, forming iron(II) ions, Fe2+

Effects of other metals on rusting (7)

Thus, iron rusts and is oxidised Half equation of oxidation Fe(s) → Fe2+(aq) + 2e‒

Rusting of iron slows down when it comes into contact with metals such as (1)

Rusting of iron slows down when it comes into contact with metals such as (2)

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Rusting (4)

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