
Concept explainers
(a)
Interpretation: The name of the given complex compounds is to be stated.
Concept introduction: Rules followed in the naming of coordination compound:
- In the naming of coordination compound, the name of anion (ligand) comes first. Metal ion is named second, which is the name of element.
- An ‘o’ is added to the root name of anion.
- Greek prefix is used to express the number of ligands.
- Roman numeral is used to denote the oxidation state of metal ion.
- In case of more than one type of ligand present in a compound, they are named alphabetically.
- The suffix ‘-ate’ is added to metal ion if complex ion contains negative charge. Latin names are also used to identify the name of metals.
- If counter ions are present in complex compound, then cation is named first, which is the name of element, whereas anion is named last, which is the name of salt.
To determine: The name of the complex compound
(a)

Answer to Problem 35E
Answer
The name of complex compound
Explanation of Solution
Explanation
The complex compound is
Oxidation state of Chlorine ion
Oxidation state of neutral Ammonia
It is assumed that the oxidation state of metal ion Cobalt
The given complex compound contains six Ammonia molecules and two Chlorine molecules (counter ion). Since, the overall charge on stable compound is zero. Therefore,
Therefore, the oxidation state of Cobalt is
The given complex compound contains six Ammonia molecules. Hence, the name of anion is hexaammine. It also contains counter ion chloride salt.
Therefore, the name of complex ion
(b)
Interpretation: The name of the given complex compounds is to be stated.
Concept introduction: Rules followed in the naming of coordination compound:
- In the naming of coordination compound, the name of anion (ligand) comes first. Metal ion is named second, which is the name of element.
- An ‘o’ is added to the root name of anion.
- Greek prefix is used to express the number of ligands.
- Roman numeral is used to denote the oxidation state of metal ion.
- In case of more than one type of ligand present in a compound, they are named alphabetically.
- The suffix ‘-ate’ is added to metal ion if complex ion contains negative charge. Latin names are also used to identify the name of metals.
- If counter ions are present in complex compound, then cation is named first, which is the name of element, whereas anion is named last, which is the name of salt.
To determine: The name of the complex compound
(b)

Answer to Problem 35E
Answer
The name of complex compound
Explanation of Solution
Explanation
The complex compound is
Oxidation state of Iodine ion
Oxidation state of neutral Water
It is assumed that the oxidation state of metal ion Cobalt
The given complex compound contains six water molecules and three Iodine ions (counter ion). Since, the overall charge on stable compound is zero. Therefore,
Therefore, the oxidation state of Cobalt is
The given complex compound contains six water molecules. Hence, the name of anion is hexaaqua. The compound also contains counter ion Iodide salt.
Therefore, the name of complex ion
(c)
Interpretation: The name of the given complex compounds is to be stated.
Concept introduction: Rules followed in the naming of coordination compound:
- In the naming of coordination compound, the name of anion (ligand) comes first. Metal ion is named second, which is the name of element.
- An ‘o’ is added to the root name of anion.
- Greek prefix is used to express the number of ligands.
- Roman numeral is used to denote the oxidation state of metal ion.
- In case of more than one type of ligand present in a compound, they are named alphabetically.
- The suffix ‘-ate’ is added to metal ion if complex ion contains negative charge. Latin names are also used to identify the name of metals.
- If counter ions are present in complex compound, then cation is named first, which is the name of element, whereas anion is named last, which is the name of salt.
To determine: The name of the complex compound
(c)

Answer to Problem 35E
Answer
The name of complex ion
Explanation of Solution
Explanation
The complex compound is
Oxidation state of Chlorine
Oxidation state of Potassium
It is assumed that the oxidation state of metal ion Platinum
The given complex compound contains two Potassium atoms (counter cation) and four Chlorine atoms. Since, the overall charge on stable compound is zero. Therefore,
Therefore, the oxidation state of Platinum is
The given complex compound contains four Chlorine atoms. Hence, the name of anion is tetrachloro. It also contains counter cation Potassium. The Latin name of Platinum is Platinate.
Therefore, the name of complex ion
(d)
Interpretation: The name of the given complex compounds is to be stated.
Concept introduction: Rules followed in the naming of coordination compound:
- In the naming of coordination compound, the name of anion (ligand) comes first. Metal ion is named second, which is the name of element.
- An ‘o’ is added to the root name of anion.
- Greek prefix is used to express the number of ligands.
- Roman numeral is used to denote the oxidation state of metal ion.
- In case of more than one type of ligand present in a compound, they are named alphabetically.
- The suffix ‘-ate’ is added to metal ion if complex ion contains negative charge. Latin names are also used to identify the name of metals.
- If counter ions are present in complex compound, then cation is named first, which is the name of element, whereas anion is named last, which is the name of salt.
To determine: The name of the complex compound
(d)

Answer to Problem 35E
Answer
The name of complex ion
Explanation of Solution
Explanation
The complex compound is
Oxidation state of Chlorine
Oxidation state of Potassium
It is assumed that the oxidation state of metal ion Platinum
The given complex compound contains four Potassium atoms (counter cation) and six Chlorine atoms. Since, the overall charge on stable compound is zero. Therefore,
Therefore, the oxidation state of Platinum is
The given complex compound contains six chlorine atoms. Hence, the name of anion is hexachloro. It also contains counter cation Potassium. The Latin name of Platinum is Platinate.
Therefore, the name of complex ion
(e)
Interpretation: The name of the given complex compounds is to be stated.
Concept introduction: Rules followed in the naming of coordination compound:
- In the naming of coordination compound, the name of anion (ligand) comes first. Metal ion is named second, which is the name of element.
- An ‘o’ is added to the root name of anion.
- Greek prefix is used to express the number of ligands.
- Roman numeral is used to denote the oxidation state of metal ion.
- In case of more than one type of ligand present in a compound, they are named alphabetically.
- The suffix ‘-ate’ is added to metal ion if complex ion contains negative charge. Latin names are also used to identify the name of metals.
- If counter ions are present in complex compound, then cation is named first, which is the name of element, whereas anion is named last, which is the name of salt.
To determine: The name of the complex compound
(e)

Answer to Problem 35E
Answer
The name of complex compound
Explanation of Solution
Explanation
The complex compound is
Oxidation state of Chlorine ion
Oxidation state of neutral Ammonia
It is assumed that the oxidation state of metal ion Cobalt
The given complex compound contains five Ammonia molecules and one Chlorine atom. It also contains counter Chloride ions. Since, the overall charge on stable compound is zero. Therefore,
Therefore, the oxidation state of Cobalt is
The given complex compound contains five Ammonia molecules and one Chlorine atom. Hence, the name of anion is pentaamminechloro. The compound also contains Chloride salt.
Therefore, the name of complex ion
(f)
Interpretation: The name of the given complex compounds is to be stated.
Concept introduction: Rules followed in the naming of coordination compound:
- In the naming of coordination compound, the name of anion (ligand) comes first. Metal ion is named second, which is the name of element.
- An ‘o’ is added to the root name of anion.
- Greek prefix is used to express the number of ligands.
- Roman numeral is used to denote the oxidation state of metal ion.
- In case of more than one type of ligand present in a compound, they are named alphabetically.
- The suffix ‘-ate’ is added to metal ion if complex ion contains negative charge. Latin names are also used to identify the name of metals.
- If counter ions are present in complex compound, then cation is named first, which is the name of element, whereas anion is named last, which is the name of salt.
To determine: The name of the complex compound
(f)

Answer to Problem 35E
Answer
The name of complex compound
Explanation of Solution
Explanation
The complex compound is
Oxidation state of Nitrite
Oxidation state of neutral Ammonia
It is assumed that the oxidation state of metal ion Cobalt
The given complex compound contains three Ammonia molecules and three Nitrite molecule. Since, the overall charge on stable compound is zero. Therefore,
Therefore, the oxidation state of Cobalt is
The given complex compound contains three Ammonia molecules and three Nitrite molecule. Hence, the name of anion is triamminetrinitro.
Therefore, the name of complex ion
Conclusion
In the naming complex ion, anion is named first, whereas metal ion is named second.
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Chapter 20 Solutions
Chemistry: An Atoms First Approach
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