Ionic solid Na⁺ A^- crystallise in rock salt type structure. 2.592 gm of ionic solid salt NaA dissolved in water to make 2 litre solution. The pH of this solution is 8. If distance between cation and anion is 300 pm, calculate density of ionic solid (in gm/cm³) .

$\text{ (Given : }{\mathrm{pK}}_{\mathrm{w}}=13,{\mathrm{pK}}_{\mathrm{a}}\left(\mathrm{HA}\right)=5,{\mathrm{N}}_{\mathrm{A}}=6\times {10}^{23}\text{ ) }$