Question

For redox reactions Mg + 2HCl --> MgCl2 + H2 and Fe + 2HCl --> FeCl2...

For redox reactions Mg + 2HCl --> MgCl2 + H2 and Fe + 2HCl --> FeCl2 + H2, what is their oxidation half reaction, reduction half reaction, and the minimum number of electrons exchanged in the redox reaction?

My subject is Chem 2

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Homework Answers

Answer #1

Mg + 2HCl ------------------> MgCl2 + H2

Oxidation Half [ loss of electrons]

Mg ------------> MgCl2

The oxidation state of Mg is increased frm 0 ( in Mg) to +2 ( in MgCl2)

Reduction Half

2H+------------> H2 [ gain of electrons]

The oxidation state of hydrogen decreased frm +1 to 0 ( hydrogen gas)

The number of electrons involved in the above redox process is 2 ( two)

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Fe + 2HCl --> FeCl2 + H2

Oxidation Half   [loss of electrons]

Fe ------------> FeCl2

The oxidation state of Fe is increased from 0 ( in Fe) to +2 ( in FeCl2)

Reduction Half [ gain of electrons]

2H+------------> H2

The oxidation state of hydrogen decreased frm +1 to 0 ( hydrogen gas)

The number of electrons involved in the above redox process is 2 ( two)

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