A freezing point depression experiment was conducted using tert-butyl alcohol as the solvent instead of water...
A freezing point depression experiment was conducted using tert-butyl alcohol as the solvent instead of water
The freezing point of pure tert-butyl alcohol is 27C and Kf=9.1C/mol. To 25g of tert-butyl alcohol was added 0.70 g of a non-electrolyte solute (i.e. sugar). The solution was cooled and the new freezing point was determined to be 20C.
1. What is the molar mass of the unknown non-electrolyte solute?
2. In a similar experiment, MgCl2 (MW= 95.2 g/mol) solute was added to tert-butyl alsohol and the (delta)Tmp indicated a molar mass = 38.9 g.mol. What is the experimental value of i, the Vant Hoff factor, for MgCl2? Explain why the Vant Hoff factor for MgCl2 is less than 3.
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A freezing point depression experiment was conducted using
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