Homework Help: Chemistry

Posted by Sharon on Monday, November 8, 2010 at 12:27pm.

The boiling point elevationof an aqueous sucrose solution is found to be 0.39 degrees Celsius. What mass of sucrose (molar mass=342.30g/mol) is contained in 500g of the solution? Kb (water)=0.512degrees C/m

Chemistry - DrBob222, Monday, November 8, 2010 at 3:35pm
delta T = Kb*molality
Solve for m

m = moles solute/kg solvent
Before going further, are you sure you have copied the problem correctly? There is a difference between 500 g SOLUTION and 500 g SOLVENT.
Chemistry - DrBob222, Monday, November 8, 2010 at 3:44pm
Also, if it is 500 g solution, a density is needed.

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