Question

If a nail made of elemental iron [Fe(s)] is placed in an aqueous solution of a soluble palladium(II) salt [Pd2+(aq)], the nail will gradually disappear as the iron enters the solution as Fe3+(aq) and palladium metal [Pd(s)] forms.


Is this a redox equation?


Balance and show the net ionic equation that describes this reaction.

Answer 1

Answer:

Yes, its a redox reaction.

Explanation:

It is obviously a redox reaction.

Oxidation: Fe (s)=Fe3+(aq)+3e-(aq)

Reduction: Pd2+(aq)+2e-=Pd(s)

Fe os oxidized as its oxidation state increased from 0 to +3

Pd is reduced as ots oxidation state decreased from +2 to 0.

Add 2x oxidation + 3x Reduction and cancel electrons to get ionic equation:

2Fe (s) + 3Pd2 + (aq) = 2Fe3+(aq)+3Pd (s)

Answer 2

The reaction between a palladium(II) salt and iron is a redox reaction.

A redox reaction is one in which electrons are lost or gained. One of the reacting species looses electrons while the other specie gains electrons. Species in a redox reaction loose or gain electrons depending on their position in the electrochemical series.

The reaction between a palladium(II) salt and iron is a redox reaction because Fe(s) looses electrons while  palladium(II) gains electrons. The oxidation number of  Fe(s) increases from zero to +2 while the oxidation number of palladium(II) decreases from +2 to zero. The reaction occurs as follows; Fe(s) + Pd^2+(aq) -------> Fe^2+(aq) + Pd(s)

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