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Question
The freezing point of an aqueous 0.050 m solution of a platinum(IV) complex having the molecular formula Pt(NH3)3Cl4 is -0.19ºC. Which of the following equations best represents what happens when Pt(NH3)3Cl4 dissociates in water? (Kf for water is 1.86ºC/m.)
A) Pt(NH3)3Cl4(s) →[Pt(NH3)3Cl2]2+(aq) + 2Cl-(aq)
B) Pt(NH3)3Cl4(s) →[Pt(NH3)3Cl3]+(aq) + Cl-(aq)
C) Pt(NH3)3Cl4(s) →[Pt(NH3)3Cl]3+(aq) + 3Cl-(aq)
D) Pt(NH3)3Cl4(s) →[Pt(NH3)2Cl2]2+(aq) + 2Cl-(aq) + NH3(aq)
E) Pt(NH3)3Cl4(s) →Pt4+(aq) + 4Cl-(aq) + 3NH3(aq)
Answer
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