\( \mathrm{KCl} \) crystallizes in the same type of lattice as does \( \mathrm{NaCl} \). Given t...

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\( \mathrm{KCl} \) crystallizes in the same type of lattice as does \( \mathrm{NaCl} \). Given that \( r_{\mathrm{Na}^{+}} / r_{\mathrm{Cl}^{-}}=0.50 \) and \( r_{\mathrm{Na}^{+}} / r_{\mathrm{K}^{+}}=0.70 \), calculate the ratio of the side of the unit cell for \( \mathrm{KCl} \) to that for \( \mathrm{NaCl} \) :(a) \( 1.143 \)(b) \( 1.224 \)(c) \( 1.414 \)(d) \( 0.875 \)
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