Question
Download Solution PDFIn trigonal planar arrangement the ratio is -
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Trigonal Planar Arrangement and Ionic Radii Ratios
- Ionic compounds often form geometric arrangements based on the ratio of the radius of the cation to the radius of the anion ( \(r_c / r_a\) ).
- Different geometries are stabilized by specific ranges of this ratio.
- In a trigonal planar arrangement, a cation is surrounded by three anions in a plane forming a triangular shape.
EXPLANATION:
- The radius ratio (\(r_c / r_a\) ) dictates the preferred geometry:
- \(r_c / r_a\) = 0.155 - 0.225 : This range is for trigonal planar arrangement where the cation fits snugly between three anions arranged in a triangle.
- \(r_c / r_a\) = 0.225 - 0.414 : This range stabilizes a tetrahedral arrangement.
- \(r_c / r_a\) = 0.414 - 0.732 : This range stabilizes an octahedral arrangement.
- \(r_c / r_a\) = 0.732 - 1.00 : This range stabilizes a cubic arrangement.
The correct option for a trigonal planar arrangement is 0.155 - 0.225
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