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The unit cell of NaCl crystal has 4Na^(+...

The unit cell of NaCl crystal has `4Na^(+)and4Cl^(-)` ions. The edge length of the unit cell is 5.64Å. What is the density of NaCl crystal?

Text Solution

Verified by Experts

`rho=(ZxxM)/(a^(3)xxN),Z=4,M=23+35.5=58.5`
`thereforerho=(4xx58.5)/((5.64xx10^(-8))^(3)xx6.022xx10^(23))g*cm^(-3)`
`=2.16g*cm^(-3)`
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