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Stability constant is more for the compl...

Stability constant is more for the complex:

A

(a) `[Ag(NH_3)_2]^(+)`

B

(b) `[Cu(NH_3)_4]^(2+)`

C

(c) `[Ag(CN)_2]^(-1)`

D

(d) `[Co(NH_3)_6]^(3+)`

Text Solution

AI Generated Solution

The correct Answer is:
To determine which complex has the highest stability constant, we need to analyze the given complexes based on the factors affecting stability constants. Here’s a step-by-step breakdown of the solution: ### Step 1: Identify the oxidation states of the central metal ions in each complex. - **A:** Ag (Silver) in Ag(NH3)2+ has an oxidation state of +1. - **B:** Cu (Copper) in Cu(NH3)4^2+ has an oxidation state of +2. - **C:** Ag (Silver) in Ag(CN)2^- has an oxidation state of +1. - **D:** Co (Cobalt) in Co(NH3)6^3+ has an oxidation state of +3. **Hint:** Higher oxidation states of the central metal ion generally lead to greater stability of the complex. ### Step 2: Determine the coordination numbers of each complex. - **A:** Coordination number = 2 (from 2 NH3). - **B:** Coordination number = 4 (from 4 NH3). - **C:** Coordination number = 2 (from 2 CN^-). - **D:** Coordination number = 6 (from 6 NH3). **Hint:** A higher coordination number can contribute to greater stability of the complex. ### Step 3: Analyze the basicity of the ligands. - **A:** NH3 is a neutral ligand and has moderate basicity. - **B:** NH3 is a neutral ligand and has moderate basicity. - **C:** CN^- is a stronger field ligand compared to NH3 and has higher basicity. - **D:** NH3 is a neutral ligand and has moderate basicity. **Hint:** The basicity of ligands affects the stability of the complex; stronger basic ligands can stabilize the complex better. ### Step 4: Compare the factors for stability. 1. **Oxidation State:** - D (Co^3+) has the highest oxidation state (+3). 2. **Coordination Number:** - D (Co(NH3)6^3+) has the highest coordination number (6). 3. **Basicity of Ligands:** - NH3 is less basic than CN^-, but since D has the highest coordination number and oxidation state, it outweighs the basicity factor. ### Conclusion: Considering all three factors (oxidation state, coordination number, and basicity of ligands), complex D (Co(NH3)6^3+) is the most stable due to its high oxidation state and coordination number. **Final Answer:** The stability constant is more for the complex D (Co(NH3)6^3+). ---
To determine which complex has the highest stability constant, we need to analyze the given complexes based on the factors affecting stability constants. Here’s a step-by-step breakdown of the solution: ### Step 1: Identify the oxidation states of the central metal ions in each complex. - **A:** Ag (Silver) in Ag(NH3)2+ has an oxidation state of +1. - **B:** Cu (Copper) in Cu(NH3)4^2+ has an oxidation state of +2. - **C:** Ag (Silver) in Ag(CN)2^- has an oxidation state of +1. - **D:** Co (Cobalt) in Co(NH3)6^3+ has an oxidation state of +3. ...
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Knowledge Check

  • For the same metal ion stability constant is more for the ligand

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    B
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    C
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    A
    `CN^(-)` is the strongest ligand
    B
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    C
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