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Question

How does K2[PtCl4] get ionized when dissolved in water? Will it form precipitate when AgNO3 solution is added to it? Give a reason for your answer.

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Solution

K2[PtCl4] is a coordination compound with complex ion [PtCl4]2.
When K2[PtCl4] is dissolved in water, the complex ion [PtCl4]2 will retain its identity.
K2[PtCl4]2K++[PtCl4]2
However when AgNO3 is added to K2[PtCl4], grey precipite of PtCl2(AgNO3)(S) is obtained.
K2PtCl4+2AgNO32KCl(aq)+PtCl2(AgNO3)(S)

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