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I guess you can use my question as a ref.

How many grams of sulfur (S8) would have to be dissolved in 110.0 g of carbon tetrachloride to lower the freezing point by 1.70 degrees celsius?

kf = 29.8 K-kg/mol for CCl4

Enter a numerical answer only, do not include units in the answer you enter

Correct, computer gets: 1.60945503355705

Hint: Don't forget to include the van't Hoff factor i, if it is needed.
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This is how I solve it:

(1.70)*(0.110)/(1)(29.8)=.0062751678

(32.066)*(8 atoms)*(.0062751678)=1.609756245

2007-03-08 14:12:10 · answer #1 · answered by Raki 3 · 0 0

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