Question

Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (assume the density of water to be one).

Answer 1

Answer:

37moles/lit

Explanation:

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