Creating an activity series on reduction potentials 1. 2Al(s)+3Cu(2+)--->2Al(aq)

Question

Creating an activity series on reduction potentials 1. 2Al(s)+3Cu(2+)--->2Al(aq)+3Cu(s) 2.Cu(2+)+Mg(s) ---->Mg(2+)(aq)+Cu(s) 3.Zn(s)+ Cu(2+)(aq) --->Zn(2+)(aq)+Cu(s) 4.3Mg(s)+2Al(3+)(aq)--->2Al(s)+3Mg(2+)(aq) 5.Mg(s)+Zn(2+)(aq)---->Mg(2+)(aq)+Zn(s) 6.3Zn(2+)(aq)+2Al(s)---->3Zn(s)+2Al(3+)(aq) Creating an activity series on reduction potentials 1. 2Al(s)+3Cu(2+)--->2Al(aq)+3Cu(s) 2.Cu(2+)+Mg(s) ---->Mg(2+)(aq)+Cu(s) 3.Zn(s)+ Cu(2+)(aq) --->Zn(2+)(aq)+Cu(s) 4.3Mg(s)+2Al(3+)(aq)--->2Al(s)+3Mg(2+)(aq) 5.Mg(s)+Zn(2+)(aq)---->Mg(2+)(aq)+Zn(s) 6.3Zn(2+)(aq)+2Al(s)---->3Zn(s)+2Al(3+)(aq) Creating an activity series on reduction potentials 1. 2Al(s)+3Cu(2+)--->2Al(aq)+3Cu(s) 2.Cu(2+)+Mg(s) ---->Mg(2+)(aq)+Cu(s) 3.Zn(s)+ Cu(2+)(aq) --->Zn(2+)(aq)+Cu(s) 4.3Mg(s)+2Al(3+)(aq)--->2Al(s)+3Mg(2+)(aq) 5.Mg(s)+Zn(2+)(aq)---->Mg(2+)(aq)+Zn(s) 6.3Zn(2+)(aq)+2Al(s)---->3Zn(s)+2Al(3+)(aq)

Explanation / Answer

We can see in all the cases Cu2+ gets reduced to Cu in all the redox reaction thus has higher reduction potential, and Mg is oxidized to Mg2+ in all the redox reactions so it has lowest reduction potential. we can see Zn2+ gets reduced and Al gets oxidised in the last reaction, therefore Zn has higher reduction potential than Al

Cu2+/Cu > Zn2+/Zn > Al3+/Al > Mg2+/Mg

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