Depression in the freezing point which means deltaT decreases as the mass of the solvent increases while the solute remains constant.
Molality is defined as the ratio of the number of moles of solute to the mass of solvent in kg. The molality is inversely proportional to the mass of the solvent. From the depression in freezing point, molality is in direct relation with the depression in the freezing point.
Therefore, depression in the freezing point which means deltaT decreases as the mass of the solvent increases while the solute remains constant.
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