Answer
Potassium chloride has the higher melting point because its coordination number is higher than that of copper iodide
Work Step by Step
In potassium chloride, one anion forms bonds with 6 anions, and vice versa. But in copper iodide, one anion bonds with only 4 cations. So, since the coordination number in potassium chloride is higher, it has a higher melting point than copper iodide
