The photographs below show what occurs when you add ammonia to aqueous nickel(II) nitrate and then add ethylenediamine (NH₂CH₂CH₂NH₂) to the intermediate blue-purple solution.

(a) Write a chemical equation for the formation of [Ni(NH₂CH₂CH₂NH₂)₃]²⁺ from [Ni(H₂O)₆]²⁺ and ethylenediamine, and relate the value of K for this reaction to K₁ and K₂.
(b) Which species, [Ni(NH₂CH₂CH₂NH₂)₃]²⁺,[Ni(NH₃)₆]²⁺, or [Ni(H₂O)₆]²⁺ is the most stable? Explain.

Transcribed Image Text:

[Ni(H,O)]2*(aq) + 6 NH3(aq) green [Ni(NH3)]+(aq) + 6 H,O() blue-purple K₁