Ethylenediamine Complexes of Nickel

Hazards: 

Nickel sulfate is considered a cancer suspect agent.

Ethylenediamine in ethanol is flammable and corrosive.

Chemicals and Solutions: 

400 mL 0.lM nickel (II) sulfate

10 mL 25% ethylenediamine solution in ethanol

Materials: 

Four tall cylinders

eyedropper

glass stirring rods

OR:  pre-prepared display of the ethylenediamine complexes of nickel

Procedure: 

Place 100 mL of the nickel (II) sulfate solution into each of the cylinders. To one cylinder add a few drops (about 0.5 mLs) of the ethylenediamine solution to get the green-blue color of Ni(H2O)4en2+. To the next cylinder add one or two mL of the ethylenediamine solution to get the blue color of Ni(H2O)2(en)22+. To the third cylinder add about 4 mL of the ethylenediamine solution to get the violet color of Ni(en)32+.

 

To schedule a demonstration, please send an email to the demonstration lab.

 

Contact:

Eric Camp

Lecture Demonstration Technician

Bagley Hall 171

(206) 543-1606

ericcamp@uw.edu

 

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