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Calculate the concentration in molality of the NaClrn aqueous solution with the freezing point of -13.2 ∘crn . Assume complete dissociation of NaClrn .rnexpress your answer in moles per kilogram to three significant figures.
Accepted Answer
The molality of the NaCl aqueous solution can be calculated using the freezing point depression constant of water, which is 1.86 °C/m.
ΔTf = Kf * molality
-13.2 °C = 1.86 °C/m * molality
molality = -13.2 °C / 1.86 °C/m
molality ≈7.10 mol/kg
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