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4 January, 02:16

Consider the redox reaction below.

Mg (s) + Fe2 + (aq) - >Mg2 + (aq) + Fe (s)

Which equation is a half reaction that describes the reduction that is taking place?

Fe2 + (aq) + 22 - > Fe (s)

Mg (s) - Mg2 + (aq) + 2e

Fe2 + (aq) - >Fe (s) + 2e-

Mg (s) + 2e--> Mg2 + (aq)

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  1. 4 January, 02:18
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    Fe2 + (aq) + 2e - > Fe (s)

    Explanation:

    Oxidation:

    Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

    Reduction:

    Reduction involve the gain of electron and oxidation number is decreased.

    Consider the following reaction:

    Mg (s) + Fe2 + (aq) - >Mg2 + (aq) + Fe (s)

    Magnesium loses its two valance electrons and oxidized while iron accept two electrons get reduced.

    Magnesium is reducing agent while iron is oxidizing agent.

    Oxidizing agents:

    Oxidizing agents oxidize the other elements and itself gets reduced.

    Reducing agents:

    Reducing agents reduced the other element are it self gets oxidized.
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