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Ionic Bonding

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A certain form of AgI adopts the zinc blend (ZnS & FCC) structure. The density of the salt is 5.69 g/cm3.
a) Calculate the length of a side of the unit cell
b) Calculate the distance between the Ag+ and the I- ions in the structure.

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Solution Preview

AgI adopts an FCC structure.

We know that density is given by,
rho = Z*M/(a^3*N)...(1)

where, Z = No of atoms in unit cell
N is Avogadro's Number = 6.023*10^23
M is the Molar mass of the Crystal
a^3 is the volume of ...

Solution Summary

This solution is provided in 186 words. It uses density and molar mass equations to find length, as well as internuclear distance.