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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: The cation M<sup>2+</sup> reacts with NH<sub>3</sub> to form a series of complex ions as follows: A 1.0 × 10<sup>-3</sup> mol sample of M(NO<sub>3</sub>) <sub>2</sub> is added to 1.0 L of 15.0 M NH<sub>3</sub> (K<sub>b</sub> = 1.8 × 10<sup>-5</sup>) . Which of the following would be a dominant species in this solution? A) M(NH<sub>3</sub>) <sup>2+</sup> B) M(NH<sub>3</sub>) <sub>3</sub><sup>2+</sup> C) M<sup>2+</sup> D) M(NH<sub>3</sub>) <sub>2</sub><sup>2+</sup> 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) . 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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