Problem: List the following solutions in order of increasing boiling points.(a) 0.60 m NaClO4(aq)   (b) 0.50 m CaBr2(aq)(c) 0.40 m Fe(NO3)3

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We’re being asked to list the given aqueous solutions in order of increasing boiling points.

Recall that the boiling point of a solution is higher than that of the pure solvent and the change in boiling point (ΔT­b) is given by:

ΔTb=Tb, solution-Tb, pure solvent

The change in boiling point is also related to the molality of the solution:



i = van’t Hoff factor

m = molality of the solution (in m or mol/kg)

Kb = boiling point elevation constant (in ˚C/m) of the solvent

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Problem Details

List the following solutions in order of increasing boiling points.
(a) 0.60 m NaClO4(aq)   
(b) 0.50 m CaBr2(aq)
(c) 0.40 m Fe(NO3)3

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