Question

In a mixture composed of Al3+, Fe3+, Ni2+, and Pb2+...which ion should be separated first? Please...

In a mixture composed of Al3+, Fe3+, Ni2+, and Pb2+...which ion should be separated first?

Please explain why so I am able put the concept to use in other questions.
Also, should there be more than one way to separate a mixture composed of all 4 of these ions? and if so, why? what makes this mixture special as to why they would ask that question?

Science   Chemistry   
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Homework Answers

Answer #1

Normally, we add HCl in excess so it is acidic

The chloride ions will make precipitate Pb

Pb+2 + 2Cl- --> PbCl2 (s)

There are plenty of ways, depending on the order, the reactants you have, and the time/steps required

It is "special" since you must follow the typical "Separation of Cations"

the order of groups:

Group 1 = (Ag+ , Pb2+, Hg2 2+)

Group 2 = (Hg2+, Bi3+ , Cu2+ , Cd2+)

Group 3 = (Co2+, Ni2+, Fe3+, Mn2+, Cr3+, Al3+, Zn2+)

You will have specific reaction sof Ni, Fe and Al

Group 4 = (Ca2+, Ba2+, Mg2+, K+ , Na+ , NH4 + )

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