The ratio of density of to that of is — Solid State Chemistry Question

💡 Solution & Explanation

Density ρ = (Z * M) / (Na * a^3). Z = 4 for both. M_NaCl = 23 + 35.5 = 58.5 g/mol, M_KCl = 39 + 35.5 = 74.5 g/mol. rho_NaCl / rho_KCl = (M_NaCl / M_KCl) * (a_KCl / a_NaCl)^3 = (58.5 / 74.5) * (1.143)^3 = 0.785 * 1.493 = 1.17.