The density of crystalline sodium chloride is 2.165 g cm–3. What is the edge length of the unit cell? What would be the dimensions of cube containing one mole of NaCl?
We know that,ρ =N/a3(M/Na)
Where, ρ = density = 2.165 g cm–3
M = molar mass = 58.5
NA = Avogadro’* number = 6.023 x 1023
N = number of formula unit
per unit cell = 4 (for bcc)
a = 5.64 x 10-8 cm
