Question

Colligative Properties

The freezing point of distilled water was determined by recording a thermogram: -0.176 degrees Celsius. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram: -.904 degrees Celsius.
a. Determine the freezing point depression, (delta)Tf, for the ionic solution.
b. Determine effective molality (m_effective) for the ionic solution.
c. Determine the van't Hoff factor, i, for the ionic compound.
a. freezing pt depression: -.904+.176

b. freezing pt depression=effectivem*(-.52)
solvefor effective m

c. i*.200=effective molality
How did you get -.52?

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