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Hydrolysis of metal aqua ions using excess NH3.

Hi,

In the equation where you copper hydroxide undergoes hydrolysis with XS ammonia.

[Cu (OH)6]4- + 4NH3 ----->
[Cu (NH3)4(H20)2] 2+ + 6OH-

I understand that the OH- ligands are substituted for the NH3 ligands. Please could someone explain where the 2 water ligands come from?

Thanks :smile:
Your aqua ion is incorrect, it would be [Cu(OH)2(H2O)4]2+ +4NH3 this would give you 2OH- 2H2O and [Cu(NH3)4(H2O)2]2+

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