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

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Q: What is the coordination number of the complex ion [Ni(CN)4]2-?

Solution: The coordination number of [Ni(CN)4]2- is 4, as it has four cyanide ligands coordinated to the nickel ion.

Steps: 6

Step 1: Identify the complex ion, which is [Ni(CN)4]2-.
Step 2: Look at the central metal ion, which is nickel (Ni).
Step 3: Identify the ligands attached to the nickel ion. In this case, there are four cyanide (CN) ligands.
Step 4: Count the number of ligands attached to the central metal ion. Here, there are 4 cyanide ligands.
Step 5: The coordination number is defined as the number of ligands bonded to the central metal ion.
Step 6: Since there are 4 ligands, the coordination number of [Ni(CN)4]2- is 4.