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<span>The most accurate measurement based on the limitations of the balance that might be found in her recorded data would be 9.2</span>

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3 years ago

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Suppose you have a crystal composed of elements X and Y in which the radius ratio is approximately ½, so that the sodium chlorid

WINSTONCH [101]

Answer:

XY would have a higher melting point than NaCl.

Explanation:

The electrostatic force (F) between ions in an ionic lattice can be estimated using Coulomb's Law.

$F=k.\frac{q_{1}.q_{2}}{r^{2} }$

where,

k is the Coulomb's constant

q₁ and q₂ are the charges of the ions

r is the distance between the ions

X⁺⁺ and Y⁻⁻ are doubly charged with respect to Na⁺ and Cl⁻ so the force between them is 4 times the force between Na⁺ and Cl⁻. Since the force is stronger, it would require more energy to break it to take it to the liquid state, so a higher melting point is expected.

7 0

3 years ago