Question

An aqueous solution of ethanol is 3.05 M in ethanol, CH3CH2OH. Calculate the mole fraction of ethanol if the density of the solution is 0.964 g mL-1.

Answer 1

The basic defintion of mole fraction is the fraction of molecules of solute divided by total molecules.

molecules solute (assume 1 liter solution)= avag#*3.05

masswater= 964g-3.05*molmassEthanol)

molecules water=masswater/molmasswater * avag#

mole fraction= moleculessolute/totalmolecules * 100

Answer 2

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