The Cation M²⁺ Reacts with NH₃ to Form a Series

question 119

Multiple Choice

The cation M²⁺ reacts with NH₃ to form a series of complex ions as follows: A 1.0 × 10^-3 mol sample of M(NO₃) ₂ is added to 1.0 L of 15.0 M NH₃ (K_b = 1.8 × 10^-5) . Which of the following would be a dominant species in this solution?

• A) M(NH₃)²⁺
• B) M(NH₃)₃²⁺
• C) M²⁺
• D) M(NH₃)₂²⁺

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