calculate the molarity of the solution in water in which the mole fraction of ethanol is 0.040?

Asked by  | 4th Aug, 2008, 11:05: PM

Expert Answer:

Molarity = no of moles/volume in litre

  Mole fraction of ethanol =no. of moles of ethanol  /  (no. of moles of ethanol)+(no. of moles of water)--------(1)

                             Mole fraction of water =no. of moles of  water /  (no. of moles of ethanol)+(no. of moles of water)---(2)

mole fraction of water = 1- .040

                                        =.060

dividing eq(1) by (2)

.040 / .060= no. of moles of ethanol/55.5

no of moles of ehanol=37

molarity = 37/1

=37moles/lit

            

Answered by  | 13th Aug, 2008, 11:11: AM

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