Calculate the freezing point of solution when \( 1.9 \mathrm{~g} \)...

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Calculate the freezing point of solution when \( 1.9 \mathrm{~g} \) of \( \mathrm{MgCl}_{2}\left(\mathrm{M}=95 \mathrm{~g} \mathrm{~mol}^{-1}\right) \) was dissolved in 50 \( \mathrm{g} \) of water, assuming \( \mathrm{MgCl}_{2} \) undergoes complete ionization.
\( \left(K_{f}\right. \) for water \( \left.=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right) \)
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