What is the freezing point of a solution containing \( 8.1 \mathrm{~g} \mathrm{HBr} \) in \( 100...

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What is the freezing point of a solution containing \( 8.1 \mathrm{~g} \mathrm{HBr} \) in \( 100 \mathrm{~g} \) water assuming the acid to be \( 90 \% \) ionized \( \left(\mathrm{k}_{\mathrm{f}}\right. \) for water \( \left.=1.86 \mathrm{k} \mathrm{kg} \mathrm{mol}^{-1}\right) \) ?
(A) \( -0.35^{\circ} \mathrm{C} \)
(B) \( -1.35^{\circ} \mathrm{C} \)
(C) \( -2.35^{\circ} \mathrm{C} \)
(D) \( -3.53^{\circ} \mathrm{C} \)
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