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What is the geometry of the complex ion [Ni(CN)4]2-?

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Question: What is the geometry of the complex ion [Ni(CN)4]2-?

Options:

  1. Tetrahedral
  2. Square planar
  3. Octahedral
  4. Trigonal bipyramidal

Correct Answer: Square planar

Solution: 

[Ni(CN)4]2- has a square planar geometry due to the presence of 4 ligands around the nickel ion.

What is the geometry of the complex ion [Ni(CN)4]2-?

Practice Questions

Q1
What is the geometry of the complex ion [Ni(CN)4]2-?
  1. Tetrahedral
  2. Square planar
  3. Octahedral
  4. Trigonal bipyramidal

Questions & Step-by-Step Solutions

What is the geometry of the complex ion [Ni(CN)4]2-?
Correct Answer: Square planar
  • Step 1: Identify the central metal ion in the complex. In this case, it is nickel (Ni).
  • Step 2: Count the number of ligands attached to the nickel ion. Here, there are 4 cyanide (CN) ligands.
  • Step 3: Determine the coordination number of the nickel ion. Since there are 4 ligands, the coordination number is 4.
  • Step 4: Understand the geometry associated with a coordination number of 4. This typically leads to either tetrahedral or square planar geometry.
  • Step 5: Consider the nature of the ligands. Cyanide (CN) is a strong field ligand, which favors square planar geometry.
  • Step 6: Conclude that the geometry of the complex ion [Ni(CN)4]2- is square planar.
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