How to find the coordination number of a compound for example NaCl
Chemistry
ScanSolve AI Answer
To find the coordination number of a compound like NaCl, you need to understand its crystal structure. The coordination number is the number of nearest neighbors (ions or atoms) surrounding a central ion or atom in a crystal lattice.
For NaCl, which has a face-centered cubic (FCC) lattice structure:
- Imagine a central sodium ion (Na⁺). In the NaCl crystal, each Na⁺ ion is surrounded by six chloride ions (Cl⁻) at equal distances. These six Cl⁻ ions are located at the vertices of an octahedron around the central Na⁺.
- Similarly, if you imagine a central chloride ion (Cl⁻), it is also surrounded by six sodium ions (Na⁺) at equal distances, forming an octahedral arrangement.
Therefore, the coordination number for both Na⁺ and Cl⁻ ions in NaCl is 6.
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