How do you calculate boiling point of a mixture?

1 Answer
May 29, 2018

Answer:

You MEASURE the boiling point of a mixture....

Explanation:

And as always, the boiling point is the temperature AND pressure at which the vapour pressure of the liquid is equal to the ambient pressure, and bubbles of vapour form directly in the liquid. If a mixture contains SOLUTES, the boiling point of the solution is ELEVATED with respect to that of the pure solvent....

#DeltaT_"boiling"=m_"molality of solute"xxK_b#..where #K_b# is the so-called ebullioscopic constant....#K_b(H_2O)=0.512*K*mol*kg^-1#.. Solvents with higher values of #K_b#, e.g. acetic acid, cyclohexane, are sometimes used in preference to water if solubility allows....and in this way, measurement of molecular masses of the SOLUTES may be obtained....

The molality depends on the partition of the solute in the water...ionic solutes can speciate to give several particles in solution...