Homework Help: Chem 2

Posted by Payie on Saturday, July 14, 2012 at 5:28pm.

Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 12.5 g of biphenyl in 27.9 g of benzene?

Chem 2 - DrBob222, Saturday, July 14, 2012 at 5:33pm
mole fraction benzene = XC6H6 = moles benzene/total mols.
mols benzene = grams/molar mass
mols biphenyl = grams/molar mass

Then p_C6H6 = X_C6H6 * P^o_C6H6 = ?

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