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Questions and Answers
What is a characteristic feature of coordination compounds?
What is a characteristic feature of coordination compounds?
- They contain ligands that are joined to metal through coordinate bonds. (correct)
- They consist only of metal ions.
- They always completely dissociate in solution.
- They are formed solely by the reaction of acids and bases.
Which of the following is an example of a double salt?
Which of the following is an example of a double salt?
- [Cu(NH₃)₄]SO₄
- KCl
- Na₂CO₃
- K₂SO₄ ⋅ Al₂(SO₄)₃ ⋅ 24H₂O (correct)
How do complex salts differ from simple salts?
How do complex salts differ from simple salts?
- Complex salts contain only anions.
- Complex salts undergo complete dissociation in solution.
- Complex salts involve coordination bonds with ligands. (correct)
- Complex salts are formed exclusively from metal cations.
Which of the following is not a characteristic of simple salts?
Which of the following is not a characteristic of simple salts?
What is the formula representation of coordination compounds?
What is the formula representation of coordination compounds?
Flashcards
Simple salts
Simple salts
Compounds formed by the reaction of acids and bases, containing a cation and an anion.
Double salts
Double salts
Compounds formed by the combination of two different simple salts.
Complex salts (Coordination compounds)
Complex salts (Coordination compounds)
Compounds where a central metal ion is bonded to other molecules or ions (ligands) through coordinate bonds. They don't dissociate fully in solution.
Ligands
Ligands
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Coordinate bond
Coordinate bond
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Study Notes
Coordination Compounds
- Coordination compounds are those compounds where a metal ion and ligands are joined by a coordinate bond
- Examples include [ML] where M is the metal ion and L are ligands
Types of Coordination Compounds
- Simple salts: Formed by the neutralization reaction of acids and bases. Form a cation and anion. Examples include KCl, Na2CO3, Al2(SO4)3
- Double salts: Formed by the combination of two or more simple salts in a well-defined ratio. Examples include K2SO4•Al2(SO4)3•24H2O (potassium alum) and FeSO4•(NH4)2SO4•6H2O (Mohr's salt).
- Complex compounds (or coordination compounds): Compounds where a central metal ion is bonded to surrounding ligands. They exist as complex ions(e.g. [Cu(NH3)4]SO4) or complex anions(e.g. [Co(NH3)6]Cl3). These don't fully dissociate in solution. Examples include K4[Fe(CN)6], [Cu(NH3)4]SO4, [Co(NH3)6][Cr(C2O4)3]
Properties of Coordination Compounds
- Complex compounds are often colored
- Some can be paramagnetic.
- Double salts are well-defined, crystalline solids of definite composition.
- Their behavior in solutions differs from that of simple salts. Complex compounds don't completely dissociate into ions.
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