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At 25 degrees C, the vapor pressure of pure water is 23.76mmHg and that of a urea solution is 22.98mmHg. Calculate the molality of the solution.

Respuesta :

XA = PA/PA^0

XA = 22.98/23.76 = 0.9671

0.9671 : 0.0328

bi = ni/msolvent

0.9672 * 18.015/1 mol  = 17.42 g H2O

bi = 0.0328 mol urea/17.42 g H2O * 1000

bi = 1.88 m

hope this helps






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