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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: GGHH on May 24, 2006, 07:22:46 PM

Title: Colligative Problem
Post by: GGHH on May 24, 2006, 07:22:46 PM

I need help with this question

How many grams of water need to be added to 95 grams of glucose to lower the freezing point to -10 celcius ?

I would appreciate any help
Thanks

Title: Re: Colligative Problem
Post by: Dan on May 24, 2006, 07:45:20 PM

have you been given the enthalpy of fusion?

Title: Re: Colligative Problem
Post by: GGHH on May 24, 2006, 08:20:41 PM

No

I am working with molality and molarity boiling and freezing point
and
Kb=.512 C/m
Kf=1.86 C/m

Title: Re: Colligative Problem
Post by: Borek on May 25, 2006, 03:20:42 AM

Try to do the question "How much glucose have to be added to 1kg of water to lower the freezing point by 10 deg C" first.