Ammonia complexes. Ag+ + 2 NH3 ↔ [Ag(NH3)2]+. 1.6 x 107. Zn2+ + 4 NH3 ↔ [Zn(NH3)4]2+. 7.8 x 108. Cu2+ + 4 NH3 ↔ [Cu(NH3)4]2+. 1.1 x 1013.
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