The number of ions produced by [Pt(NH3)]Cl2?
Correct answer: C. 3
- A. 4
- B. 2
- C. 3
- D. 5
Explanation
The formula [Pt(NH3)]Cl2 represents one complex ion and two chloride ions when it dissociates, giving 1 + 2 = 3 ions in solution. The chloride ions are outside the brackets and ionize separately. Students may choose 2 by counting only the chloride ions or 4 by counting atoms instead of ions.
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About Ionic and Molecular Crystals
Ionic crystals contain oppositely charged ions held by electrostatic forces, whereas molecular crystals contain discrete molecules joined by weaker intermolecular forces. Their structures explain differences in melting point, hardness, volatility, solubility and electrical conductivity, especially between solid and molten states.
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