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March 28, 2015

Homework Help: chemistry

Posted by Anonymous on Wednesday, May 5, 2010 at 9:14pm.

dimethylglyoxime is used as a reagent in qualitative analysis to precipitate the nickel(II) ion. a solution is made by dissolving 57.0 grams of DMG in 430.0 g of ethanol.
(a) what is the mole fraction of DMG in this solution?
(b) what is the molality of this solution?
(c) what is the vapor pressure over the solution at ethanol's normal boiling point, 78.4 degrees Celsius?
(d) what is the boiling point of this solution (DMG does not dissociate)? Kb (ethanol) = +1.22 degrees celsius/m

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