The cation M 2+ reacts with NH 3 to form a series of complex ions as follows:   M2+ + NH3M(NH3)2+ K1 = 102   M(NH3)2+ + NH3M(NH3)22+ K2 = 103   M(NH3)22+ + NH3M(NH3)32+ K3 = 102 A 1.0 × 10–3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8 × 10–5). Choose the dominant species in this solution

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