(c) If the ionic radii of Ca$^{2+}$ and O$^{2-}$ are 0.1 nm and 0.14 nm respectively. Given the Avogadro's number is 6.023x10$^{23}$ atoms/mol and the atomic weights of Ca$^{2+}$ and O$^{2-}$ are 40.078 amu and 15.999 amu respectively, calculate the following parameters of calcium oxide. (i) Ionic packing factor of CaO. (4 marks) (ii) Theoretical density (give your answer in g/cm³). (3 marks)
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The volume of a sphere can be calculated using the formula V = (4/3)πr^3, where V is the volume and r is the radius. For the Ca2+ ion: V_Ca2+ = (4/3)π(0.1 nm)^3 V_Ca2+ = (4/3)π(0.001 nm^3) V_Ca2+ = 4.18879 x 10^-4 nm^3 For the O2- ion: V_O2- = (4/3)π(0.14 Show more…
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